PDF versions of forms you may need are available below. This contract was developed specifically for dog walkers and includes the vital information you'll need to record for your dog-walking assignments.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. Our Service Areas: We provide service to all unincorporated communities of San Diego County. You must buy your dog's first license before it is five months old or within 30 days of moving it into our service area if the dog is older than five months. San Diego Humane Society's Humane Law Enforcement has officers in the field seven days a week, handling a variety of animal cruelty complaints.