(909) 336-6800

Arrowhead Animal Hospital

Helping you care for your best friend!

Prior to becoming a veterinarian Dr. Coleman completed his Bachelor’s degrees in Biology and then due to an interest in math went to graduate school in engineering completing both his MS and his PhD in chemical (electrochemical) engineering.   After graduate school, he worked as a software development consultant teaching software development to businesses around the country (with some short stints teaching in a couple of other countries as well).  While software development, engineering, and teaching were enjoyable and are still interests of Dr. Coleman, becoming a veterinarian was always in the back of his mind.   So in 2002 Dr. Coleman went back to school to become veterinarian.  

Dr. Coleman obtained his DVM degree in 2006 from Texas A&M University.   After graduating veterinary school, he completed a 1 year rotating internship at a specialty and emergency hospital in Sacramento.  After completing this internship, he practiced in Northern California and Texas before moving back to California and our San Bernardino Mountains in 2012.  His interests include both general practice and emergency medicine.   

In his off time Dr. Coleman enjoys spending time with his wife and son and 4 dogs, and hiking and enjoying all the outdoors here have to offer. 

Dr. Rains was born and raised in Southern California.  He attended Claremont High School and served as a paratrooper in the 101st Airborne Division.  Following his discharge, he attended Oklahoma State University, earning his doctorate in Veterinary Medicine in 1975.

After graduation, he returned to So. California, joining a small animal practice in Chino for two years and then also worked for a year at an emergency clinic in Montclair.   In 1979 he purchased Arrowhead Veterinary Hospital and moved with his family to the mountains.  Dr. Rains is proud to say he has spent half his life on the mountains.  His sons are graduates of Rim High School.

An active participant in the community, Dr. Rains has been a member of the local Rotary Club for 33 years, serving as president in 2008. In 2010 he and his wife, Jo Bonita, were honored as Lake Arrowhead's citizens of the Year. 


Indeed, their Arrowhead Animal Hospital has digital X-ray, ultrasound, in-house blood profiling, computerized record keeping and amenities not found in many veterinary practices.  Their partnership provides the foundation for a veterinary hospital that combines modern technology with old-fashioned care and compassion.

Drs. Coleman, Rains and Mayne are proud of their facility and their ability to provide first class veterinary care to the community they love.  They feel fortunate for the opportunity to work together with a talented and caring staff in one of California's most beautiful landscapes.

Dr. Mayne's passion in caring for animals began early, when as a young child in rural upstate New York he watched veterinarians diagnose and treat livestock, dogs, and cats in the surrounding barnyards and pastures.

After high school, he attended Cornell College of Agriculture.  He was awarded a full scholarship in his junior year to attend the Universidad de Buenos Aires in Argentina, beginning an interest in Spanish and international events.  After receiving his undergraduate degree, he remained at Cornell, graduating from the College of Veterinary Medicine where he particularly enjoyed studying small animal surgery. Even now he devotes a large part of his practice to surgical cases.

Following graduation, Dr. Mayne practiced in several veterinary hospitals in the Boston community.  He conceived and built the Vickory Hill Veterinary Hospital in Southboro, MA which won the Veterinary Economics Magazine National Hospital Design 'Merit of Honor Award'.  He went on to study business at Boston University and, after receiving his MBA degree, he moved with his family to southern California.

For three years he owned and operated Alpine Animal Hospital in Rim Forest before joining practice with Dr. Rains.