Just wondering how long I can keep my New 1 year old AB in a crate? He is crate trained. But I am scared to leave him alone with our other dog. Can he stay in a crate for a few hours? I know this may sound rediculous but I honestly have no idea??? I just dont trust leaving My AB and my other AB mix together without me there. I just got my AB today and they have been together all day with no problems. But I would hate myself if something happened. Oh and will there ever come a time where they can be left alone together?