Meet Purina’s Pet Experts

Purina has a robust team of pet experts ranging from veterinarians and nutritionists to behaviorists and other specialists. Our pet experts strive to help pets live their best lives through quality nutrition and innovation.

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Meet Dr. Callie Harris, DVM
Meet Dr. Callie Harris, DVM
Meet Dr. Callie Harris, a Purina veterinarian and one of our pet experts. Dr. Harris provides technical education support and is passionate about pet nutrition.
Meet Dr. Emily Cross, DVM, DABVP
Meet Dr. Emily Cross, DVM, DABVP
Dr. Emily Cross joined Purina in 2005 and is currently the Director of Purina’s Professional Resources Group. She manages Purina’s college programs at the University of California at Davis, Washington State University, Colorado State University and Western University.
Meet Dr. Kurt Venator, DVM, PhD
Meet Dr. Kurt Venator, DVM, PhD
Dr. Kurt Venator has worked with Purina for more than 17 years and currently serves as our Chief Veterinary Officer. He earned his Doctor of Veterinary Medicine degree from Cornell University and a PhD in Zoology – Behavior & Physiology from the University of Texas at Austin.
Meet Dr. Ragen T.S. McGowan, PhD
Meet Dr. Ragen T.S. McGowan, PhD
Dr. Ragen McGowan is a research scientist in pet behavior and welfare who has been with Purina for more than 10 years. She earned bachelor’s degrees in Zoology and Foreign Language and a PhD in Applied Ethology from Washington State University.
Meet Karina Carbo-Johnson, M.S.
Meet Karina Carbo-Johnson, M.S.
Karina Carbo-Johnson, M.S., is a Senior Nutritionist in the Technical Services department at Nestlé Purina. Learn about her background, expertise and more here.
Meet Dr. Jason Gagné, DVM, DACVIM
Meet Dr. Jason Gagné, DVM, DACVIM
Meet Dr. Jason Gagné, one of Purina’s pet experts and our Purina’s Director of Veterinary Communications. Learn about his background, expertise and more here.
Meet Dr. Sandra Lyn, PhD
Meet Dr. Sandra Lyn, PhD
Meet Dr. Sandra Lyn, one of Purina’s pet experts and our Senior Manager for Global Pet Behavior and Welfare Research at Nestlé Purina. Learn about her background, expertise and more here.
Meet Dr. Karie Johnson, DVM
Meet Dr. Karie Johnson, DVM

Meet Dr. Karie Johnson, one of Purina’s pet experts and our Purina Veterinary Communications Manager. Learn about her background, expertise and more here.

Meet Dr. Martha G. Cline, DVM, DACVIM
Meet Dr. Martha G. Cline, DVM, DACVIM
Dr. Martha Cline joined Nestlé Purina PetCare in 2021 as a Veterinary Communications Manager. She provides technical education support for Purina’s veterinary sales division and for veterinary teaching hospitals throughout the Northeast and Midwest.
Meet Dr. Michael T. Robbins, DVM, DACVIM
Meet Dr. Michael T. Robbins, DVM, DACVIM
Dr. Michael “Mike” T. Robbins received his Doctorate of Veterinary Medicine in 2015 from the University of Tennessee in Knoxville. It was here Dr. Robbins found his love of nutrition and began his professional journey.