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Dr. Gene Harlan


Gene Harlan is the senior partner at Cotati Large Animal Hospital. He grew up in Fresno County on a dairy and beef farm where he first became interested in veterinary medicine.  After working for a local large animal veterinarian for a number of years, Gene attended U.C. Davis.  He graduated from veterinary school in 1973 and then went on to complete a yearlong internship in equine and bovine reproduction.


Gene helped establish the Preceptor Program which allows senior veterinary students to come to Cotati Large Animal and learn medicine in “real world” conditions.  He is also past president of the Cattleman’s Association and has been a Sonoma County 4-H leader and Animal Health Advisor for the California Dept. of Food and Agriculture.  In addition, Gene also received the 2007 Sonoma County Horse Council’s Equus Hall of Fame Award for 33 years of service in Sonoma County.  Dr. Harlan is famous for his Equine Dentistry and working with Lamintic horses.  He enjoys doing a mixed large animal practice.  In his spare time, he raises beef cattle and enjoys riding his horse and mule.

Dr. Calvin Dotti

Dr. Calvin Dotti was born and raised in Sonoma County where his family has operated a dairy for over 60 years. Dr. Dotti graduated from Analy high school and went on to complete his undergraduate studies and veterinary school at U.C. Davis.  Dr. Dotti has been at Cotati Large Animal for over 22 years and is also a partner in the practice alongside Dr. Harlan. His interests include dairy herd work at both organic and conventional dairies, and small ruminant and camelid medicine.

Dr. Dotti lives in Rohnert Park with his wife Christine and two kids Peter & Alex. In his free time, he enjoys water skiing and spending time at the lake on his boat with his family. 

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Dr. Sally Venable


Dr. Venable is originally from Ventura, CA. She majored in Biology at Willamette University in Salem, OR and then went on to get her veterinary degree from Ross University. After graduation Dr. Venable went on to do a food animal internship at Oklahoma State before moving to Sonoma County. She enjoys working on all large animal species but specializes in Equine wellness and lameness with an emphasis on performance horse soundness. 


She has quite the collection of animals herself ranging from 3 mini Shetland sheep, chickens, some curious cats, and two dogs Alfie and Ellie. When not at work Dr. Venable enjoys spending time camping with her Husband Austin and young daughter or working on home projects together around their house in Forestville. 

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Dr. Emelie Roche


Dr. Roche was born in Sweden and raised in Petaluma, CA.  Her family has owned their ranch in Petaluma for about 100 years.  She began showing lambs for 4H in the fifth grade and continues to maintain a small herd of Dorset and Shropshire sheep on her ranch today.  She studied Animal Science at Cal Poly San Luis Obispo and earned her DVM from UC Davis.  She loves working on all large animals but especially enjoys working on sheep and goats.  In her free time, Emelie enjoys hiking and hanging out with her sassy cat, Luna.

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