Animal services spokesman Dan DeSousa says all three properties are owned by a 66-year-old man and are believed to be part of the same operation.
Authorities say they also seized hundreds of knives, which can be attached to the fighting birds' legs. Cockfighting trophies and photographs were seized at the Anaheim restaurant.
DeSousa says the birds will have to be euthanized because of their trained aggressiveness.
The case will be submitted to prosecutors once the investigation is completed.