He might be friendly towards strangers when you are there, but without you and when he is at home, he might be more inclined to bark.Isolating him In their Rentals will make him unsocial and a poor pet.He is a boxer...they are pretty friendly dogs. I'd be happy my dog was friendly.Just for the record, I take my dog on a walk and he will see someone coming and give them the full body wag. On the other hand, some guy came to my door who was being pushy and obviously stressing me out. My dog came behind me growling with the hair standing up on his back. He knew the difference. This isn't to say this will happen with every dog every time