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 pratice.  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. Calvin 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. His interests include dairy herd work at both organic and conventional dairies, and small ruminant and camelid medicine.  Calvin lives in Rohnert Park and enjoys water skiing and relaxing with his wife and 2 children.

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. She currently loves roaming around with her boyfriend Austin, dog Alfie and cat Batman. She enjoys working on all large animal species but especially small ruminants and equine. 

8079 Gravenstein Hwy, Cotati, CA 94931



Open: Mon-Fri 8 to 5 \ Sat 9-12 \ 24 hour Emergency Service