Has he had any behavioral training, like puppy kindergarten? Take him if not.

I am concerned at how much time he is left outside during the day. Especially considering how young he is. Has he had all his shots, especially rabies? I sometimes feel guilty for leaving my Nicki (only she's a girl ) outside for more than half an hour by herself. I check on her obsessively to make sure she's behaving and enjoying herself. Believe me, being outside be himself all day long ther are so many things that he could get into that could hurt him: eating berries, toxic shrubs, being bitten by a rabid animal.... then we have the realm of what humans might potentially do to him.