Arial I agree with crating, kong, and not making a fuss however, I found it best to spend time putting the little guy in the crate going out the door and returning immediately, still not making a fuss, but letting him out quietly, next time within the hour extending the time leaving him in the crate and continue this during a period of time during the same day, so he gets the idea that you are coming back but not sure when. It worked for my guys and to this day I always give them a small treat when they go in the crate and they look forward to it. Good luck.