This is who I take my chickens to too!! I've taken my desert tortoises there too. Highly recommend themRosanne Brown of Rancho San Diego Animal Hospital not only sees chickens but she loves them and is a chicken owner herself. They have other great vets but for chickens you want her.
Edit:
I assumed just chickens. Janet Loken saw my ducks and she's fantastic, too. Used to work there so can tell you from first hand experiance. Will be a bit of a drive for you but don't know anyone else that I'd recommend.
