To increase home security, consider buying an alarm system rather than a dog. It may qualify for an insurance discount. Consult a veterinarian for advice. Never put a dog in a position where it feels threatened. Have the dog spayed or neutered.
Unneutered dogs are three times more likely to bite than neutered dogs.
Do not run past a dog or disturb it while it is eating, sleeping or caring for puppies. Playing aggressive games can encourage inappropriate behavior. Never approach a dog you don't know, and avoid teasing or eye contact with a dog that appears threatening.