While wasp spray is harsh(causes immediate blindness) it is not like he is going into your back-yard todo this or doing it because he hasn't been hurt or threatened by such a large dog(100lbs). If a dog is loose it can get slammed by a car and hang around in a ditch dying for a while also, yet you aren't complaining about that? If your dog is loose it can go around drinking up pools of anti-freeze and that isn't a pretty ending either. If you're not around to take the dog to the hospital for the antidote to the wasp-spray or for surgery from the car hit or well i don't think you can do anything about anti-freeze then you're just being a neglectful(carefree?) owner and everybody at vet clinic is going to know.

Dogs will be dogs, is just like saying kids will be kids... It is just a lame excuse for bad behaviour in a perfectly trainable animal ruined by a lazy owner. Do you let the dog out the front door every time a cyclists goes by and then shut the door and say "Dogs will be dogs" then go back to watching tv? That is what that statement sounds like to me.