My dog 'bites' sometimes, but she never means it to be harmful, shes only playing and usually only mouths me (like put her mouth over my arm or hand but no force to it) sometimes she gets excited and bites hard, and it hurts! but then she puts that "i'm sorry :[" face..i know she doesn't mean it. I most DEFINITLY wouldnt let your dad shoot or whatever, the dog probably just didn't do and and all of a sudden shooting at it would only confuse and scare your dog, and wouldn't be fair to it. I would find something else to do. A trainer told me once, when the dog bites, take your thumb and push down on it's tounge and it should stop it from doing it