He doesn't like being left for more than a few hours (we think this is because he was brought back to us). He is crated as he can chew things. He is happy to be crated and knows when it's bed time. He will often go and lie in his crate to rest. He can be quite jumpy and bouncy when he is excited. Out on a walk he can sometimes have lead frustration and bark at other dogs when they come a little to close. He has never been aggressive. Arlo is going to need a family that is going to have plenty of time for him, I think family with a dog already.