What a bunch of MORBID SOB'S, who find it so easy to say just kill the dog, shoot it between the eyes (to messy),shoot at the base of the skull, use a baseball bat ETC. You picked the breed, it's your responsibility to train it either by a professional or yourself if your qualified, which I doubt. It seems dogs are like shoes if you don't like them or the way they fit, throw them away or in your case kill him, that's real sad. Next time you get a dog (and I hope you don't) get a stuffed one at the fair they are guaranteed easy to train.

I am sorry to here about your son; my son had a similar injury when he was 2 years old. I was in line at the store with my son by my side and the guy in front of us swung his arm back (by accident) and stuck the hot box of his cigarette in my sons eye, creating a quick trip to Emergency room. Gee, should I have decked the guy with a baseball bat? No it was an accident.
Hope you can find a nice home for your dog, let your conscious be your guide.