Thanks for all the great feedback! Max
is recently neutered and King the rotty isn't. I don't think I will ever leave them alone, I was wondering if it would be possible, but now I think not. King is usually friendly, but you never know what will happen if his dad isn't around. He's big enough that he scares me if no one is around! They play nicely together, I'm usually there so it's usually on King's turf and we both hold them by their leash.