Meet Our Doctors
Veterinarian Tucson » Veterinary Staff » Tucson Vets
Totten K. Warfield, Jr., DVM
Dr. T.K. Warfield, a native Tucsonan, has been affiliated with Valley Animal Hospital for over 30 years. He became an associate of the hospital in 1975 after graduating from Washington State University, College of Veterinary Medicine. He attended the University of Arizona for his undergraduate degree. Go Cats!
Dr. Warfield’s practice has a strong focus on joint disease, soft tissue and orthopedic surgery. He serves as the primary veterinarian for several law enforcement canine units.
As an active community leader, Dr. Warfield has been a member of The Centurions for many years and has served on various boards throughout his career. Dr. Warfield enjoys outdoor activities and spending time with family. He and his wife, Donna, are spending every available moment spoiling their grandchildren.
John D. Vagnetti, Jr., DVM
Dr. Vagnetti was inspired to become a veterinarian as a youngster while visiting his cousin’s veterinary clinic. As he watched a litter of puppies being delivered by c-section, he decided to pursue veterinary medicine.
Following graduation in 1983 from Michigan State University, College of Veterinary Medicine, Dr. Vagnetti left the Great Lakes, trees, and snow to begin his career at Valley Animal Hospital. Dr. Vagnetti’s professional interests include reptile medicine and small mammal medicine.
Dr. Vagnetti enjoys traveling, fishing, scuba diving, and reading. He and his wife, Alpha, include their two dogs in many of their outdoor adventures.
Blake A. Herrington, DVM
Following a four year tour in the U.S. Air Force, Dr. Herrington earned his B.S. degree in Cellular and Developmental Biology in 1982 from the University of Arizona. He received his D.V.M. in 1993 from Colorado State University, College of Veterinary Medicine.
Dr. Herrington joined Valley Animal Hospital in June of 1993. His service provides small animal medicine and surgery, with a focus on gastroenterology and avian medicine and surgery.
Dr. Herrington stays busy raising his children and caring for their many and various pets. He enjoys home improvement projects, bicycling, bagpipe playing, as well as traveling.
Debra P. Kellams, DVM
Dr. Debra Kellams was born and raised in Erie, Pennsylvania. Following graduation from Edinboro University in 1976, she moved to Tucson to work in the virology lab at the University of Arizona. Her background in the medical field and great love of animals influenced her decision to pursue a career as a veterinarian.
Dr. Kellams joined Valley in 1985, after graduating from Colorado State University, College of Veterinary Medicine. Her service provides small animal medicine and surgery, including special interests in avian and exotic mammal medicine and surgery. She has also developed her skills in veterinary abdominal ultrasound.
Her interests outside of veterinary medicine include spending time with family, skiing, aerobics, and cycling.
Dr. Alexis Moreno worked at Valley Animal Hospital as a veterinary assistant during her undergraduate studies at the University of Arizona. She then attended Colorado State University, College of Veterinary medicine where she graduated as valedictorian in 2003. Following a small animal/exotic medicine and surgical internship at Florida Veterinary Specialists and North Bay Animal Hospital as well as an externship at Busch Gardens in Florida, she was hired as an associate and practiced in Tampa Florida before returning to Valley as a staff veterinarian in October 2005. Dr. Moreno enjoys cardiology, ultrasonography, avian and exotic mammal medicine and surgery, as well as emergency medicine. She is currently the chief veterinarian for our local AZA accredited Reid Park Zoo where she provides medical and surgical care for their over 600 avian and exotic mammal collection. Dr. Moreno and her husband have three daughters and enjoy spending their leisure time outdoors whenever possible!
Lindsay McCrady, DVM
Dr. Lindsay McCrady grew up in Tucson, AZ and became interested in veterinary medicine during her eleven years of participation in 4-H showing pygmy goats. She completed her undergraduate studies
at the University of Arizona and earned a B.S. in Veterinary Science with a minor in Chemistry
in 2005. During that time she also worked as a veterinary technician here at Valley Animal Hospital and became manager of the emergency service. She then earned her Doctor of Veterinary Medicine degree from Colorado State University in May of 2009, graduating with recognition from the International Veterinary Emergency and Critical Care Society. From there she moved to Florida and completed a specialty internship in Small Animal Medicine and Surgery. Dr. McCrady has eight years of experience as an emergency veterinary technician and has a strong interest in Emergency and Critical Care Medicine. Her other professional interests include internal medicine and small ruminant medicine.
She elected to move back to Arizona to settle down and be close to her family. She rejoined the Valley team with hopes of ultimately joining in partnership with her sister, who is also a veterinarian at Valley, and be at the forefront of gold standard veterinary care. In her free time, Dr. McCrady enjoys snuggling with her three kitties, riding her ATV, water-skiing, spending time with her family and playing volleyball. She is also very passionate about goats!!!
Amy Hoffman, DVM
Dr. Amy Hoffman is originally from western New York and began her career in veterinary emergency medicine as a veterinary assistant at an emergency clinic in Buffalo during her undergraduate studies. She then moved to Long Island and worked as an emergency technician for five years. She then attended Ross university and completed her clinical year at Cornell university, graduating with her DVM in 2002 with honors. Amy has worked multiple veterinary emergency practices from Long Island to Las Vegas. Most recently she spent a year at a specialty and referral practice in Pittsburgh, Pa. She moved to Tucson to join the Valley Animal Hospital family in 2011 and hopes to have found her new home. Her interests include cardiology and strong interest in feline and pocket pet emergency and critical care medicine.
In her spare time she is kept quite busy with her husband, 4 children, 5 cats, an English Bull Terrier, 3 guinea pigs, 2 chinchillas, 7 parakeets and a green Iguana. With any other free time she enjoys yoga, music and horseback riding.
Lucy Schroth, DVM
Dr. Schroth was born and raised in Brooklyn, NY and earned a bachelor’s degree in chemistry from Oberlin College, in Ohio. She graduated from Cornell University, College of Veterinary Medicine in 1980 and then practiced in southeastern Pennsylvania until 2007 when she and her husband moved to Cape Cod, Massachusetts to be closer to her husband’s teenage son. Dr. Schroth and her husband moved to Tucson in 2012 and plan to make this their permanent home.
Dr. Schroth owned her own companion animal practice for 13 years before concentrating on emergency and critical care medicine. Her other veterinary interests include; internal medicine, soft-tissue surgery, cytology, dermatology, and pocket pets.
In her spare time, she enjoys knitting, making polymer clay miniatures, music (classical and southern gospel), gardening, and Christian Ministry. Her husband is the pastor of a new non-denominational church in Tucson. Their animal family currently consists of a German Shepherd named Ginny, but they hope to raise some chickens and goats in the near future.
Dr. Sarah Carotenuto joined Valley Animal Hospital as an Urgent Care and Emergency veterinarian. Her professional interests include emergency, critical care, surgery, and ultrasound.
After graduating from Duke University in 1999, Dr. Carotenuto worked in strategic business consulting in New York City. When she was having more fun at her volunteer work at the Central Park Zoo and an animal shelter, she decided to return to school to pursue a career in veterinary medicine. She graduated from North Carolina State University College of Veterinary Medicine in 2007. Following a process of additional studies and testing, she received board certification in canine and feline practice in 2014. www.abvp.com
Dr. Carotenuto practiced in Flagstaff and the Phoenix area prior to moving to Tucson. In her spare time, she enjoys hiking, biking, swimming, kayaking and all things that allow her outdoor time in Arizona. She also enjoys volunteering at her local church and cooking.
Dr. Sarah Carotenuto’s last name is hard to pronounce “Car(like an auto)-o-ten(like the #10)-ew-toe.”
Dr. Katie Arntzen is originally from Boston and completed her DVM degree at Tufts University. She had a variety of pets growing up and knew from a young age that she wanted to someday become a veterinarian. She has always had a keen interest in wildlife as well as small animal medicine, and has recently returned from South Africa where she was working with a variety of species including lions, rhinos, elephants, and wild dogs.
She is currently one of two veterinarians at our Sahuarita location.
Katie spends much of her free time with her dog “Peaches” who she has newly adopted from an Arizona animal shelter. She enjoys spending time outdoors and the change from cold Boston winters to sunny Arizona!
Carla Bernal, DVM
Dr. Carla Bernal is a Florida native who graduated from the University of Florida College of Veterinary Medicine in 2013. An undergraduate internship in Namibia, Africa with the Cheetah Conservation Fund shaped her passion for wildlife and zoological medicine. Dr. Bernal’s professional interests include exotic, zoo, and wildlife medicine, small mammal medicine, soft tissue surgery, ophthalmology, and emergency medicine. She plans to pursue board certification in zoological medicine.
In June 2013 she came to Valley Animal Hospital to complete a 1 year internship and we were very impressed with her abilities and offered her a permanent position at our Sahuarita location. Dr. Bernal has a very outgoing, bubbly personality and has proven her abilities as an exceptional veterinarian.
Dr. Bernal enjoys yoga, running, hiking, skiing, and traveling. She has two cats, Senghe and Kyila, and two guinea pigs, Thor and Loki. She is looking forward to exploring more of Arizona in her spare time!
Dr. Chris Thibault was born and raised in Michigan where he received a Bachelor’s degree in Chemistry from Hope College and a Master’s degree in Biology from the University of Michigan-Flint. While attending the Michigan State University College of Veterinary Medicine, Dr. Thibault spent time at Potter Park Zoo, the San Diego Zoo, and the San Diego Zoo Safari Park before graduating in 2014. Dr. Thibault’s professional interests are diagnostic imaging, cardiology, surgery, and exotic/avian medicine, and he would like to pursue a residency in zoological medicine.
Outside of work Dr. Thibault enjoys backpacking/camping, speed-skating, watching the Detroit Red Wings, and before veterinary school he was an active member of various orchestras. He has performed in an orchestra tour of the United Kingdom and Carnegie Hall twice.
Kim was born on Long Island, New York though moved with her family as a child to Jacksonville, Florida. She attained her undergraduate degree, Doctorate of Veterinary Medicine with a certificate in shelter medicine at the University of Florida. Prior to obtaining her degrees, Kim worked for over ten years as a small animal emergency technician and still enjoys emergency and critical care medicine today. During veterinary school, Kim became involved in wildlife rehabilitation, which remains a passion. Kim also studied and participated in shelter medicine including high quality high volume spay and neuter services, shelter animal behavior and welfare, and animal cruelty and forensics investigation. Kim’s mail career focus is provide exceptional care to her small animal and exotic patients in both a general practice and emergency setting.
Aside from wildlife rehabilitation and volunteering in animal shelters, Kim enjoys outdoor activities such as horseback riding, archery, swimming, and hiking as well as reading and spending time with her husband and four cats.
Dr. Jessica Weeks, a native Oregonian, received her B.S. at the University of California, Davis in Neurobiology, Physiology and Behavior. After four years of schooling and competing for the NCAA women’s swimming team, Dr. Weeks pursued different interests including research in elephant behavior and dolphin cognition. She eventually found herself in the Florida Keys working as a dolphin trainer. Wanting to provide the best care she could for these special animals, Dr. Weeks decided to pursue a career in exotic animal medicine. She earned her Doctorate of Veterinary Medicine from the University of Florida, with a certificate in Aquatic Animal Medicine. Jessica’s professional interests include zoological and aquatic medicine, ophthalmology and surgery.
Outside of the hospital, Jessica used to enjoy anything that was associated with water: SCUBA diving, spearfishing, surfing, and underwater hockey. Now she looks forward to finding new (and drier) hobbies here in the desert of Arizona.