Max did well at a young age (5 months) and then regressed. He would pee sometimes during play time. I think he would get over stimulated and not realize it was "time". He is 11 months now and still has accidents every once in a while. I really try to take him out frequently so that it won't happen but he hates grass it takes him sooo long to do his business. He has trouble deciding where the right spot is. LOL!