Is there a doctor in the house?

Fish Creek 24 Hour Pet Hospital is owned by Dr. Natasha Mutlow, Dr. Katie Van Sluys, Dr. Mark Norman, Mel Robinson (RVT), Dr. Erica Johnson, Dr. Charlotte Whale, Dr. Devin Nobert and Dr. Vanessa Carl. There are numerous team players necessary for our veterinary clinic to operate successfully. At Fish Creek 24 Hour Pet Hospital this includes all of our veterinarians (see bios below), Registered Veterinarian Technologists, Technician Assistants and Receptionists. Select a doctor from the list below to learn more about them.

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Dr. Katie Van Sluys (B.Sc, DVM) completed a BSc in Agriculture from the University of Alberta in 1995 and then went on to the Western College of Veterinary Medicine in Saskatoon where she graduated in the class of 1999. During veterinary school Katie met her husband Dr. Jayson Van Sluys (WCVM class 1998), who also works at Fish Creek. Jayson and Katie moved to the United States after graduation where Katie completed a companion animal internship in New Haven, Connecticut. During the internship Katie developed a passion for emergency/critical care medicine and emergency surgery wherein she further developed this interest at a 24 hour referral centre in Virginia Beach, Virginia. Katie and Jayson moved back to Canada in early 2004 and settled in south Calgary. The Van Sluys family consists of two children, a Jack Russell Terrier and some interesting caged pets. Katie currently spends her extra time volunteering with the AbVMA, the local YMCA and in her children's class rooms. The family loves to camp and travel and when she can, Katie enjoys a good hot yoga class!

Dr. Natasha Mutlow (B.Sc, DVM) received her Bachelor of Science from the University of Calgary and her Doctor of Veterinary Medicine with Distinction from the Western College of Veterinary Medicine in 2002. Since graduation, Natasha has only practiced in 24 hour veterinary clinics and has a love for emergency medicine, internal medicine and routine and emergency surgery. As a founding partner of the Fish Creek Pet Hospital, Natasha also enjoys the challenge of managing a very busy clinic. Natasha enjoys spending time with her daughter, Evelyn, as well as with her fur kids, Great Dane Kona, Boston terrier Ruby, American Eskimo Brutus, tabby cat Rosco and horse, Guinness. She enjoys getting together with family and friends, horseback riding and traveling.

Dr. Mark Norman (B.Sc, B.Ed, DVM) graduated from the Western College of Veterinary Medicine in 1999 and has been practicing in Calgary ever since. However he took some varying career paths before settling into veterinary medicine. He acquired his B.Sc. in Marine Biology from UBC where he was also a member of the championship Thunderbirds football team. A move to Alberta brought him to the CFL playing for the Edmonton Eskimos for 5 years which included a Grey Cup win in 1987. He then went on to complete a B.Ed. from the U of A in 1994. Dr. Norman was also a marine mammal trainer which involved work at facilities close to home as well as internationally, including Florida and Australia. Dr. Norman is currently an owner of the Fish Creek 24hr Pet Hospital and the Southpointe Pet Hospital. He divides his time between these clinics but admittedly has a passion for emergency medicine. In his spare time you might find him out on a golf course or home with his girlfriend and their furry family of four Bernese Mountain Dogs.

Dr. Sheri Clarkson (B.Sc, DVM DACVIM) grew up in Regina, Saskatchewan but has strong family roots in Alberta which is the reason she returned to Alberta after gathering advanced education in the United States. In 1996, Sheri graduated from the Western College of Veterinary Medicine, in Saskatoon, Saskatchewan. After completion of her veterinary degree she went to Tuft University, Foster Hospital for Small Animals, in North Grafton, Mass. to pursue an internship in Emergency Critical Care and Anesthesia. From 1997 through to 2000, Sheri was in Lansing, Michigan at Michigan State University Veterinary Teaching Hospital completing a Small Animal Internal Medicine residency. During her residency she also spent time at North Carolina State University Veterinary teaching Hospitals in the Oncology department. Since becoming board certified in Internal medicine, Sheri worked in two large private practice specialty referral hospitals one in North Carolina (2000 – 2003) and one in Calgary (2004-2009). Recently Sheri went out on her own and started Clarkson Veterinary Internal Medicine Services Inc to continue offering her type of specialty practice to the veterinary community of Calgary and surrounding areas.

Sheri's research papers have concentrated around the development of a diagnostic test for diabetes insipidus in the dog and Shetland Sheepdog Leukodystropy (a disorder in the Sheltie's defined by Sheri in her residency). During her residency Sheri developed a strong interest in ultrasound and has integrated imaging into her form of practice. Her interests are diverse but endocrinology, gastroenterology (bowel, liver, pancreas), nephrology/urology (kidney and bladder) and immunology/hematology top the list. Sheri has a husband, two little girls, and a Golden retriever that keeps her busy when not at work.

Internal medicine specialty services include:

  • - Consultation on any defined or currently undefined disease state to develop a diagnostic and then therapeutic plan
  • - Abdominal and thoracic ultrasound
  • - Guided biopsies, bone marrow aspirate, bone marrow core biopsy and placement of feeding tubes
  • - Treatment of oncology patients with chemotherapeutic protocols
  • - Endoscopic procedures to gather biopsies of bowel, bladder, and samples from the airways.

Dr. Mark Fuller (DVM, DACVS) is a fourth generation Albertan and was raised on a cattle farm east of Crossfield. He completed his pre-veterinary requirements at Acadia University in 2001 and obtained a Doctor of Veterinary Medicine with Distinction from the Western College of Veterinary Medicine in 2005. During veterinary school he competed in Bareback Riding and represented Canada at the 2004 College National Finals Rodeo in Casper, Wyoming.

Following graduation he completed a Large Animal Rotating Internship from the Atlantic Veterinary College, and worked as a mixed animal practitioner north of Calgary for a few years. It was during this time that he fell in love with Small Animal Surgery. He then worked as an emergency clinician at the Calgary Animal Referral Centre before moving to the United States to pursue advanced training in Small Animal Surgery in 2008.

He completed a Small Animal Rotating Internship in 2009 at the Veterinary Medical and Surgical Group, in Ventura, California. Next he worked as a Research Fellow at the Michigan State University before obtaining a residency in Small Animal Surgery at the University of California-Davis.

During his 3-year surgical residency, he worked with world-leaders in cranial cruciate ligament rupture, arthroscopy, fracture repair, joint replacement, laparoscopy, vascular surgery, surgical oncology, wound management and interventional radiology. Upon completion of his residency, he stayed on at the University of California-Davis as a Clinical Instructor. In 2014 he successfully passed his board exams to become a Diplomate of the American College of Veterinary Surgeons – Small Animal. He is excited to be back home to apply the knowledge he gained abroad.

Dr. Erica Johnson (B.Sc, DVM) grew up here in our wonderful city of Calgary. After working for several years as an Animal Health Technologist at a mixed animal practice in Cochrane, she got accepted and graduated from the Western College of Veterinary Medicine at the University of Saskatchewan in 2006.

She has been working at Fish Creek Pet Hospital since January of 2007 and recently has become one of their new partners. She enjoys the variety that one sees at the clinic on a daily basis. In particular, she has a fondness for emergency medicine and surgery.

Outside of work, she enjoys spending time with her family and friends and experiencing the beauty of our city and her second home of Hood River, Oregon. She lives with three crazy cats, Joey, Marley and Mattie.

Dr. Jayson Van Sluys (DVM) graduated from the Western College of Veterinary Medicine in 1998. He initially pursued an interest in equine medicine at an internship in St. Louis, MO and then general equine practice. Dr. Jayson always had a love of small animals and after years of battling a hay allergy made the switch to companion animal practice in 2006. Joining Dr. Katie at Fish Creek Pet Hospital has allowed the couple to balance work and family life. Jayson's personal interests include road cycling, hot yoga and outdoor activities.

Dr. Charlotte Whale (B.Sc, BVSc) hails originally from Cranbrook, BC. She received her Bachelor of Science degree in Animal Biology from the University of British Columbia in 2002. Charlotte decided to continue her education at Massey University in Palmerston North, New Zealand, where she completed her Veterinary Science degree in 2007.

Charlotte has a strong interest in emergency medicine and surgery. She joined Fish Creek 24 Hour Pet Hospital in July of 2010 after completing a small animal rotating internship at the CARE Centre in Calgary.

Since arriving in Calgary, Charlotte has acquired a furry family composed of two dogs (Indy and Noodles) as well as her horse (Cereno). She is an avid horseback rider and also enjoys downhill skiing, hiking and running.

Dr. Laura Major (DVM) graduated from the Ontario Veterinary College with honours in 2008 and has been practicing veterinary medicine in Calgary since that fall. She has always had a passion for emergency medicine and surgery. After 2 years in general practice she found her home here at Fish Creek Pet Hospital in the fall of 2010. She continues to love the challenges of emergency medicine and has also developed a special interest in veterinary dentistry. She lives here in Calgary with her two cats Mirage and Karma, and her goofy rescue dog Echo, who is also a life saving blood donor for our clinic.

Dr. Devin Nobert (B.A, DVM) was born in raised in Calgary. He obtained a BA in Psychology and his pre-vet requirements at the University of Calgary. He then moved to Saskatoon, and obtained his Doctorate of Veterinary Medicine degree from the WCVM in 2009. Devin joined the Fish Creek family early on as a student in 2006. He was hired as a vet in 2009 and remains passionate about vet emergency medicine, and the Fish Creek business and family. He is very proud to have recently joined the partnership and management team at Fish Creek Pet Hospital. He married his high school sweet heart in 2000, and they currently live just outside of Calgary with 3 beautiful children and a Boston Terrier named Piper. Outside of family and vet med, Devin is an avid golfer, camper, explorer, gamer and is extremely passionate about rock & roll. He attends as many concerts as possible (you name it, he's seen it!) and has a kick-ass album collection.

Dr. Vanessa Carl (B.Sc, DVM) obtained her Bachelor of Science degree in Biology with honours with distinction from the University of Victoria in 2003. She then went on to achieve her Doctor of Veterinary Medicine degree with distinction from the Western College of Veterinary Medicine in Saskatoon in 2007. Dr. Carl has been working as a small animal practitioner ever since and enjoys all aspects of veterinary medicine, but especially dentistry, internal medicine and oncology. Dr. Carl joined Fish Creek 24 hr Pet Hospital in 2012 and became a partner in 2017. When she's not at Fish Creek, she will probably be at our sister clinic Little Creek Veterinary Clinic in Millrise. Dr. Carl has a couple well-fed bratty cats named Tigger and Garfield, who tell anyone who will listen that they deserve more food. She also has a Border collie cross named Bernard, who keeps her own her toes with his "Marley and Me" type antics. She spends her time off practicing ashtanga yoga, doing anything "Maui" and doing home renovations.

Dr. Monica Kyono (B.VSc, B.Sc, MVS) was born in Indonesia but grew up in New Zealand. She obtained a Bachelor of Science degree in 2000, a Master of Veterinary Studies in 2002 and a Bachelor of Veterinary Science degree in 2007 at Massey University, New Zealand. She moved to Calgary after graduation and has worked in both emergency and primary care. Monica loves the excitement of emergency but also enjoys forming a good client base in the primary care department and found a great clinic in Fish Creek Pet Hospital in 2013 that allows her to have the best of both worlds. A busy household of 2 cats, a French bulldog and two young kids keeps her busy outside of work but she still finds time for yoga, bootcamp and hiking.

Dr. Chantel Brust (DVM) left her roots at the University of Alberta to surf and study as an adopted Australian at the University of Wollongong, New South Wales. Graduating with distinction from the Western College of Veterinary Medicine in Canada, she developed a special interest in emergency and zoo animal medicine. She pursued these interests completing external rotations at Canada West Veterinary Specialists in Vancouver, Guardian Veterinary Centre in Edmonton, and at the Edmonton Zoo. She has primarily spent her career focusing on critical care and internal medicine, and has additional training in ultrasound. Outside of the clinic, if she's not traveling, Dr. Chantel can be found sparring in the boxing ring or in the mountains with her fur child, Emerson.

Dr. Kate Yates (B.Sc, DVM) joined the Fish Creek team in May of 2014 upon receipt of her Doctor of Veterinary Medicine degree from the Ontario Veterinary College. She was raised in Thornhill, Ontario and completed a Bachelors with honours in Biomedical Science from the University of Guelph in 2009. Kate has a keen interest in emergency critical care medicine and had spent several summers while attending veterinary college at Fish Creek Pet Hospital under the mentorship of our great team of veterinarians and support staff. She has also enjoyed volunteering for the Alberta Spay Neuter Task Force. In her spare time, she is known to be an avid baker, skier and hockey player.

Dr. Caroline Heffernan (B.Sc, Ag, DVM) grew up on a beef farm near Norwood Ontario. She knew she wanted to be a veterinarian in grade 2. Caroline attended the University of Guelph where she completed a Bachelor of Science in Agriculture with a major in Animal Science. Caroline was a member of the Gryphon Varsity Hockey Team and the College Royal Celebrant. Sports was always a key part of growing up in her family. Caroline then completed her Veterinary degree at the Ontario Veterinary College. A keen interest in horses lead her to spend time working on Standardbred and Thoroughbred farms while studying at OVC as well as working in the Large Animal Clinic.

After graduating from OVC, Caroline went to work in Hamilton at Mountain Animal Hospital, where she was part of a wonderful team for 11 yrs. Caroline's husband's work brought them to their second home in Calgary. Caroline worked at Okotoks Animal Clinic for 11 yrs before coming to Fish Creek Pet Hospital.

Caroline is married to George Shelswell and they have two Australian cattle dogs named Bubba and Junior, and three cats. They also raise Red Angus cattle and have eight quarter horses on their farm near Mossleigh.

Caroline's interests include barrel racing, running, gardening and spending time with family. A secret dream was to be an Olympic Athlete on the track. A horse accident four years ago prevents Caroline from doing surgery. She loves getting to know her clients and their pets. Preventive health is a passion and learning how to solve medical problems keeps veterinary life exciting.

"I love being a Veterinarian and feel blessed to be part of this wonderful profession and the supportive family at Fish Creek"

Dr. Zoë Willams (B.Sc) grew up in Edmonton and completed a BSc at the University of Alberta in 2010, specializing in animal biology. She graduated from the Western College of Veterinary Medicine in 2014. During her summers throughout vet school, and for two years after graduation, Zoë worked at a small animal clinic in Grande Prairie where she provided primary care and emergency services to cats, dogs, and exotic pets. Zoë joined the Fish Creek team in September 2016 after moving to Calgary with her husband, cat, two dogs, and many tomato plants. Her passion is feline medicine, and she has a strong interest in exotic animal medicine as well. Zoë also volunteers for the Alberta Institute for Wildlife Conservation. She loves gardening and is looking forward to living on an acreage so she can fill it with plants.

Dr. Danyse Lewis was raised just outside of Cochrane and graduated from the WCVM in 2011. After graduating she completed a year-long internship in equine practice at Moore Equine Veterinary Centre where she worked with horses of all disciplines. She spent another year completing an internship in Diagnostic Imaging where her time was focused solely on creating and interpreting various imaging studies (ultrasound, x-ray, CT, MRI, Nuclear Scintigraphy) on all kinds of animals.

After completing her continuing education she decided to enter mixed animal practice, then finally emergency practice where she can draw on the knowledge gained through her internships on a daily basis.

Danyse enjoys primarily an outdoor lifestyle with her fiance Jeff and their two dogs Sadie and Tipper. In their spare time they are usually in or near the mountains; skiing, cycling, climbing, etc. She also enjoys volunteering her time with the ASNTF and CHS.

Dr. Crytal Makwana is proud to say that she was born and raised in Moose Jaw, Saskatchewan. She graduated from the Western College of Veterinary Medicine in Saskatoon in 2002. After graduation she relocated to Rochester, New York where she completed a one year rotating internship in small animal medicine and surgery. That is where she fell in love with emergency medicine! Since completing her internship in 2003, Crystal has worked the majority of her career at emergency and referral centres. She joined the Fish Creek family in September, 2015. Her love of Veterinary Medicine has come naturally after watching her veterinarian father growing up. She has a lot of early memories of spending time in his mixed animal clinic watching cow surgeries as a kid! Outside of the clinic, Crystal has a family with two little kids and one pitbull cross named Stella. She loves staying active with family time, trips to the library, yoga, and camping.

Dr. Jessie Wilkins is an Alberta native, originally from Edmonton. Although she dreamed of being a veterinarian ever since she understood what the word meant, she took a detour and started her education with an Intercultural Studies degree which lead her to Asia to teach English for 2 years. There she witnessed the after-effects of SARS in Thailand and Hong Kong and cases of avian influenza in China. She began to realize the importance of the human-animal interaction, and felt that by transitioning into veterinary medicine, she could play a role in promoting both healthy animals and healthy people. While in school, she worked at various small animal practices, and participated in Veterinarians Without Borders in Kenya. She spent some of her final-year rotations providing veterinary services on the isolated ice roads in the Sathu region of the NWT, learning how to perfect the art of the blow dart at the Calgary Zoo, and evaluating parasite loads in wolverines at Alberta Fish and Wildlife. She graduated from the University of Calgary with interests in emergency medicine, infectious disease, diagnostic imaging, and promoting a healthy human-animal bond.

She spends her free time travelling, hiking in the mountains with Adler - her four-legged creature, or cycling around Calgary in search of good coffee. She is also a bit of a foodie and loves live theatre and blues.

She looks forward to meeting you and your fuzzy sidekick!

Dr. Angela Chamberlain was born in Toronto. Although born a city girl, animals were always a passion and she completed a Bachelor of Science in Animal Biology at the University of Guelph. Her interest in animals and medicine lead her to the Ontario Veterinary College, where she graduated with distinction in 2009.

Following graduation, Angela moved to Vancouver where she fell in love with the West Coast life style. In 2016 she moved to Calgary and was thrilled to join the team at Fish Creek Pet Hospital. Angela loves camping, hiking, running, and cycling. Her 4 legged family includes 2 Boston Terriers and a Siberian Husky.

Melanie Robinson, RVT is originally from Nova Scotia. She started working with the Oaklawn Zoo and soon discovered her strong desire for working with animals and so began her career in animal medicine.

Upon graduating from Fairview College in 1999 Mel moved to Alberta where she met her now husband Scott and together they have started their own personal zoo of furry family members.

Mel has been with Fish Creek 24 Hour Pet Hospital as a Registered Veterinarian Technologist since it began in 2005. Her passion is in Emergency Medicine and Dental and she plays a vital role in the development of all the employees that make up the Fish Creek family.

Dr. Virginia Woo, DVM, BSc (Hons) was born and raised in Calgary and also completed all of her schooling here. She graduated from the UofC with a BSc with honors in neuroscience in 2012, and then continued on at UCVM to complete her DVM in 2017. Virginia has a passion for small animal medicine as well as exotics and wildlife medicine. Before joining the team at Fish Creek, she completed externships at the Dallas Zoo and MOTE Marine Laboratory and Aquarium, and worked at a small animal general practice/emergency hospital in Red Deer.

Virginia loves hanging out with her American Eskimo 'Summer', and her cat 'Kasper'. In her spare time you can find Virginia exploring the great outdoors and trying new activities.

Dr. Tathiana Anacleto, DVM was born and raised in Brazil. She received her Veterinary degree from the University of Brasilia in 2004 and has since been working in Emergency Medicine and General Practice. In 2010 Tathiana chose to follow her passion…Dentistry! She enrolled in a two year training program at the University of São Paulo, obtaining her post graduate degree in 2012. In 2014 Tathiana moved to Canada and has been working in the veterinary field since than!

In her spare time she enjoys spending time with her beloved husband and cute little boy! Cooking, travelling and sharing some laughs with close friends are a few of her favorite things!

Dr. Mark Nelson, B.Sc, M.Sc, BV.Sc was born and raised in Calgary. He received his Bachelor of Science degree in Zoology at the University of Calgary in 2008. Mark then continued his education at the University of Calgary with a Masters of Science with his research focused on aging of the nervous system.

Mark first joined the Fish Creek Pet Hospital team in 2002 when he started volunteering as a kennel hand. Soon after he was offered a job as a kennel tech and eventually advanced to a position of veterinary assistant. In 2012, under the support and encouragement of Dr. Charlotte Whale and others at Fish Creek, Mark pursued his passion for veterinary medicine and moved to New Zealand to start a Bachelor of Veterinary Science at Massey University. It was here that Mark developed his skills in veterinary medicine and developed his interest in emergency critical care. Now Mark has returned to Canada and has rejoined his family at Fish Creek.

Outside of work you'll most likely find Mark running and cycling through Fish Creek or relaxing with his Kiwi cat - Nori.

Dr. Laura A. McKay, DVM, PhD, MSc, BSc is originally from Montreal, Quebec and has lived all over Canada before moving to Calgary 10 years ago. She completed her BSc in Psychology at the University of Calgary, went on to a MSc in Neuroscience at McGill University and a PhD in Neuroscience at the University of Lethbridge. After 6 years working as a researcher at the University of Calgary, Laura decided it was time to go back to school and follow her childhood dream to become a veterinarian. She has been working at Fish Creek as a student since 2015 and joined the team as a vet in 2018. She has a special interest in emergency medicine and is excited to be working at a busy 24hr clinic.

In her spare time, Laura enjoys spending time with her husband and their young son. She also rides horses competitively (show jumping) and loves getting out to the mountains to go hiking, camping and skiing. She has two cats (Zoe and Newton), two horses (Koko and Ganesh) and "a few hardy fish!"

Dr. Jenefer Stillion, BSc, DVM, DACVECC, CCRT was born and raised in Colorado where she earned her veterinary degree from Colorado State University in 2004. She then went on to complete a one year internship in small animal medicine and surgery and continued to practice emergency medicine in the Denver metropolitan area.

In 2012, Dr. Stillion completed a residency at Cornell University in Ithaca, New York and became a board-certified specialist in small animal Emergency and Critical Care Medicine. Following completion of her residency, she moved her family to Calgary and has enjoyed living next to the Canadian Rockies since. Her professional interests include treatment of trauma and shock, transfusion medicine and sepsis.

In her free time, Dr. Stillion enjoys spending time with her husband and three children, travelling, cooking and enjoying the great outdoors. She shares her home with three very spoiled cats, two guinea pigs and one hamster.

Dr. Jennifer Poulsen, DVM, BSc was born and raised in Calgary. She went to the University of Calgary to complete her undergraduate degree in Biological Sciences and graduated in 2013. She then moved to St. Kitts, West Indies to attend Ross University School of Veterinary Medicine. She lived in West Lafayette, Indiana for a year before moving back home after graduating in 2018 and joining the wonderful team at Fish Creek 24 Hour Pet Hospital. She has a special interest in emergency medicine but also enjoys surgery and neurology. In her spare time, she enjoys spending time with her friends and family, including her four cats (Anna, Kovu, Jane, and Tarzan). She also likes cooking and finding new events and restaurants in the city to try. She hopes to eventually move just outside of the city to a nice, big property for her cats and future dog to enjoy!

Dr. Dan Katz graduated from the Ontario Veterinary College in 2016. There, he was president of the Global Vets program that coordinated student volunteer trips in Africa, Asia and Central/South America. He has participated in spay/neuter clinics in The Bahamas (2x), Belize (3x), Guatemala, Ecuador and the Galapagos Islands.A few memories have been collected on Dans blog website @

Dan dreamt of becoming a veterinarian as far back as he can remember, and was raised in a rural area of Ontario by a family of animal lovers. His dad tells stories growing up of a pigeon that used to follow his mom in the car every morning to work, and the occasional squirrel and stray orphaned animal that Dan’s grandpa would let in the house to come and go amongst the family as they please.

In 2015 he spent 4 months in Australia and New Zealand completing his veterinary externship working with both small and large animals, as well as koalas and kangaroos. Then, he was off to Geneva Switzerland for a 3-month internship in Public Health at the World Heath Organization headquarters.

After graduation, Dan pursued a fast-paced and exciting career in emergency and general medicine at Fish Creek Pet Hospital, where he has been ever since.

Dan has a passion for minimally-invasive surgery and pursued additional training in laparoscopic surgery, allowing him to provide patients with less painful surgical options.

He currently performs laparoscopic spay procedures and prophylactic gastropexys (stomach tacking to prevent GDV/bloat).

He loves meeting new clients and their pets, and thrives on making a difference in a family’s life through caring for their furry-four legged member!

His first and only dog Sadie - who became his best friend when he was 15 - is still with us 14 years later….and he's equally excited for the next 14…

Our Team of veterinarians work hand in hand with our animal health technologists and support staff. Our doctors and staff are all dedicated to and take pride in caring for your pet. We aim to care for and support your pet throughout its life and through any emergency or time of illness. At all times we endeavour to practice high quality medicine and surgery, and strive to continually update our knowledge and services.

Fish Creek has a large staff of highly trained Animal Heath Technologists who play a vital role in both emergency and routine veterinary medicine.