About Us

Providing Experienced Care for all Your Small Companions


We are a full service veterinary hospital owned by Arroyo Veterinary Hospital of Sonoma along with their supportive team of investors and Dr. Melissa Hart.

Alderbrook Pet Hospital was established by Dr. Lee W. Thorne, and his wife Annie. Upon graduation from UC Davis School of Veterinary Medicine in 1973, Dr. Thorne practiced in Sonoma County for 17 years prior to the opening of our hospital in 1990.  Our clients consistently describe Dr. Thorne as caring, gentle and considerate.  A friendly and supportive listener, they find him knowledgeable, patiently answering all questions and concerns, and offering thorough explanations of treatment plans and options.  We are often told his calm demeanor puts family pets at ease, and that he is compassionate and available.  

     Besides providing excellent medical care, our staff also understands that we are a service organization. Every member of our team is committed to providing the finest professional, personal, courteous and caring service possible. Our philosophy is a teamwork attitude with an emphasis on communication. We appreciate our clients, and would love to welcome you as part of our Alderbrook family.  

     We invite NEW CLIENTS to meet us by offering one FREE PET EXAMINATION.  Simply mention our website offer when scheduling your appointment.  

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1533 4th Street
Santa Rosa, CA 95404


(707) 542-7387
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Monday 8:30 am to 5:30 pm
Tuesday 8:30 am to 5:30 pm
Wednesday 8:30 am to 5:30 pm
Thursday 8:30 am to 5:30 pm
Friday 8:30 am to 5:30 pm
Saturday 8:30 am to 12:30 pm
Sunday Closed

Closed: New Year's Day, Memorial Day, July 4th, Labor Day, Thanksgiving, Christmas