Got Sandy when he was 11 wk old and he's paper trained. He was a good with paper - he knew where he should do his business. After we came back from our Christmas vacation at the bf's parents' (we were there for a week), Sandy started to do it anywhere he wants! We live in an apartment and he has access to all the rooms except for my craftroom. It's really frustrating because I want him to be that good potty trained pup again.