I would also have them check his eyesight, seeing that he's an older dog his eyesight may not be as clear as it was when he was pup.
That's so strange for a dog to just bite like that, out-of-the-blue, so more than likely there's something wrong with him medically...
And to resonate what others have said, it's not common practice anywhere to just put a dog to sleep because it bites... (If it is, it shouldn't be!) If we were to just punch someone, would everyone want to put us to sleep? No, lol. We're given warnings, lectures, and if nothing else works, we're caged up until we exhibit proper behavior. : P
Good luck!
That's so strange for a dog to just bite like that, out-of-the-blue, so more than likely there's something wrong with him medically...
And to resonate what others have said, it's not common practice anywhere to just put a dog to sleep because it bites... (If it is, it shouldn't be!) If we were to just punch someone, would everyone want to put us to sleep? No, lol. We're given warnings, lectures, and if nothing else works, we're caged up until we exhibit proper behavior. : P
Good luck!
