Originally Posted by
JenC
Hard to tell what causes leash aggression.
And just because the dog was purchased from a "breeder" doesn't mean that they weren't just some glorified puppy mill. Yes, labs should have scissor bite and a very off-putting misalignment could be a good reason to rehome. But just the comment that it had a bad tooth and couldn't be bred leads me to believe that they were volume breeders vs. show folks. If I bred a puppy that didn't turn out around 6 months, my reason for rehoming would be that I would not be able to SHOW the dog. True breeding is more than one tooth.
So I am going to just make the assumption that the dog was not well socialized.