The owner of every dog older than three months is required to vaccinate the dog against rabies. The dog must be vaccinated before it is five months old.PDF versions of forms you may need are available below. Residents of unincorporated areas of San Diego County should contact the County of San Diego Department of Animal Services at 619-236-2341. Dogs eligible to provide service to the San Diego Police Department will meet the following criteria: 1. San Diego Humane Society partners with DocuPet. Com so pet owners have a simple online solution for purchasing a new license or renewing an existing license. General information for animals is available at the County of San Diego Animal Services website or call 619-767-2675. Pet Travel and Quarantine. Cage-free dog daycare and boarding in East County San Diego.