6 mo. old - Aggressive, advised to PTS
I know there was a similar thread posted about a year ago where the owner ended up putting his/her puppy to sleep but my situation may be a little different. I have frequented this forum to read on everything from feeding to training and I am very grateful for the wealth of information.
We got Otto at 8 weeks from a BYB. We had not done research on these places before getting him and we are now realizing he dangers of these places. He was a little timid at first, barked at any dog he was near and was always uneasy around dogs (especially smaller dogs). The barking concerned us but he gradually got better around other dogs.
Per the advice of several people on this forum, we got Otto well acquainted with our friend's GSD. They are great together, Otto still loves playing with her and no longer barks at her.
Otto doesn't do great on the leash. He goes crazy anytime we pass a human and/or a dog. Sometimes it is playful (wagging his tail, play stance) but sometimes he seems afraid.
Recently, we were playing in the park with Otto and the other GSD and our neighbor showed up with her Great Dane. Otto went after the Great Dane and bit him pretty hard twice. We had to pull Otto off of the dog. It was very frightening.
We consulted our vet about the issue. He said we could consult a behaviorist but thinks Otto just isn't wired right and should be sedated or PTS. We consulted a dog behaviorist (over the phone as there aren't any nearby) and she seemed to think the same thing. Our friends with the GSD recommended their trainer. He is a retired military/police K9 trainer and spent about 30 minutes working with Otto. He recommended we get him in a class to start working on obedience and socialization. He said Otto does not seem aggressive to him and that with proper training, it will not be an issue.
My wife and I are concerned about Otto's aggression being turned onto humans, and the ensuing liability of a bite. My wife especially is very nervous about it, especially around visitors and our children (someday). The decision has been draining us so much and we keep going back and forth between having him PTS and trying to work on these issues with him.
Any advice is much appreciated.