A Puppy Has a Problem

As awesome as Zeus is, he has one problem that even now continues to be a giant pain in the butt, literally. He's a biter.

When we first brought him home, it was cute. He would nibble on your hands after petting him and we thought it was just something he'd grow out of. We were wrong. At about five months old, he still bites a lot, the only problem is that now it actually hurts. Those puppy teeth are sharp, and now that his jaw muscles are stronger, he can break skin quite easily. My strategy so far has been to grab him by the collar and hold his mouth shut for about 10 seconds every time he bites me. It has been pretty effective and he definitely bites me a lot less than he did before. He still bites other people a lot though and it really gets annoying. It gets to the point where I have to go put him in his crate when people come over to avoid him hurting them or ripping their clothes. I've talked to the vet and varies workers at pet stores, but nobody seems to have an effective way to help me stop his mouthy behavior. I guess I'll just have to hope he grows out of it after his teething phase.