My neice has a Maltepoo. She has had him since a puppy and no matter what she has done, other than crating him all the time, he marks around the house. She uses a belly band on him so he can be loose in the house and when he has it on, he does not mark. It does not seem to bother him and makes life easier for both of them. I don't know whether using it for actually house breaking a dog would work as I have never tried it. I think it would probably be better to start right out with him like you would a puppy. Keep him either in a crate or tethered to you so he is always watched. Lots of praise when he goes outside.