The team at Cochise Animal Hospital is comprised of highly trained and experienced animal health professionals who have a genuine love for working with pets. Our staff treats every patient with the highest quality of medical care as well as a gentle touch.

Dr. Steven A Thomasson

steve bio photoDr. Thomasson was born in Fairbanks, Alaska, and grew up in Cleveland, OH. He completed his undergraduate studies at the Michigan State University, where he received a BS in Animal Science and then earned his Doctor of Veterinary Medicine (DVM) in 1981. During veterinary school, Dr. Thomasson developed special interests in Internal Medicine, Surgery, Dermatology, and Preventative Medicine. He owned his first practice in New London, CT for 20 years, with 25 employees that included 4 veterinarians. In 2005, he sold his practice when the opportunity became available to move to the Scottsdale area where he became the owner of Cochise Animal Hospital.

In his spare time, he enjoys hiking, reading novels, astronomy, bridge, learning Spanish, dancing and traveling. Dr. Thomasson currently resides in Cave Creek with his wife Linda and their two dogs, Aspen and Willow.

Yoshio Leon

yoshio-225x300Yoshio Leon joined Cochise Animal Hospital in October 2009 as one of our experienced technicians. He brings with him 13 years of experience in the veterinary field. In addition to his experience working with dogs and cats, Yoshio also has experience treating some reptiles, rabbits, birds and most pocket pets. Yoshio is originally from Nogales, AZ and knew that he wanted to work with animals at a young age. He moved to the Phoenix area with his family in 2000. He enjoys raising his son Nick and caring for his 2 rescued pets: His blue Pit-bull “Balou” and his mixed Shar Pei “Dino”. When Yoshio is not tending to his patients at Cochise Animal Hospital, he enjoys spending time with his family and friends.

Karina Salinas

karinaKarina Salinas joined Cochise Animal Hospital staff in early May, 2014. She graduated from Carrington College with an Associate’s Degree in Animal Health Technology. She is originally from El Paso, TX and has been in the Phoenix area since 2005. She enjoys training her two rescued Chihuahua’s “Senorita Sandie” and “Oliver” to do tricks such as high 5, rollover, left and right paw to name a few tricks.

Heidi Shaw

heidiHeidi joined Cochise Animal Hospital in January 2016. She graduated from Pima Medical Institute with a degree in Veterinary Technology. She brings with her 3 years of experience in the veterinary field. She is originally from Nebraska (yes, she is a Cornhusker) where she grew up on a cattle ranch with 10.000 plus head of cattle where she realized she loved working with animals. She has a Bachelor’s Degree in Mass Communications from Northwest Missouri State University. She moved to the Phoenix area in 2012 where she lives with her rescued dog “Mikey”, a terrier mix, and her 11 (yes 11) cats. Her hobbies include yoga, hiking, leaning Spanish, having friends over and enjoying a bottle of wine, traveling to San Diego to enjoy “Pups on Paddles Boards”. She also works part-time at a nearby emergency animal hospital.

Aspen & Willow

willo“Aspen” and “Willow” enjoy playing, tug of war, and squeaky toys. Willow enjoys swimming and being brushed (and as a puppy, enjoyed chewing on Persian rugs). Aspen especially loves his green plastic football when he can get it away from Willow. They both enjoy running in the yard and chasing birds out of the trees. Aspen is 11 1/2 years old Shepherd mix and Willow is a 2 year old yellow Labrador. You will find them at the clinic most days and they always love to say “Hi” and get a treat.


aspen & konaSadly, we lost our “Kona” girl to lymphoma on January 6th, 2014 at the age of 11 years old. She is still missed dearly.



“Cali” enjoys sitting on top of the counter and rubbing everyone’s face and knocking pens out of your hand. She was a feral cat that was brought in and was adopted by Cochise Animal Hospital in 2006.


Cooper“Cooper” enjoys hanging out in his cage all day, and then roams the front of the clinic at night. He’s a little shy. He was a feral cat and brought into the clinic and was adopted by Cochise Animal Hospital in 2009. You may see him peering through the front window after hours.