I have to put my healthy 2 year old dog down. His agression towards strangers is reaching terrifying. He tried to attack a 3 year old kid by crawling under my fence. The kid was just walking!!! I have 2 kids he’s great with. .. but they’re going to want to have friends over… a trainer told me its not a case of if he’ll bite. .. but when. I just feel like I failed him…