[QUOTE=Aeternitee;8565104]
We are going through a similar thing, except our puppy is 6 months old now. We got him at 8 weeks and he came from a pretty savage litter of shelter pups. We did observe them at the shelter and none of them displayed any bite inhibition toward the others - just spent their time trying to tear each other’s skin off. We picked the least aggressive one, and thought that nurture would take care of the issue.
But at 6 months, and neutering recently, and he still will sometimes growl at us if we are handling him when he doesn’t want to be handled. He doesn’t bite, but will growl. He is very vocal in general. And he is mouthy - we have worked so hard to get him to stop play biting and mouthing as his default interaction, but are starting to be exhausted, because we expected more results by now.
We took him to puppy class and during free play periods, spent all our time pulling him off other puppies and keeping him from harassing them. He played rougher at an order of magnitude way beyond what was normal for the other puppies his age.
Now we’re thinking of rehoming him because he is getting pretty big - probably up to 35 - 40 lbs now at 6 months old - and we’re worried about the future. Argh! And yet he’s brilliant. He learns tricks instantly - but we can’t seem to modify his behavior.
I’ve never had this much trouble with a dog before. shakes head[/QUOTE]
If he’s really that smart, you should be able to train through these behaviours. It really isn’t fair to decide to make him some one else’s problem now that he’s hit the tough teenage phase. You need to get him in to a plan for more training, possibly with a trainer with a different skill set. These aren’t unexpected problems with what you observed in the litter as babies. These are the things that whoever was raising the litter should have been addressing t 5/6/7 weeks of age. Sometimes the human has to help teach bite inhibition early on.