Reilly is a beagle/cocker mix, he is 9mos old and we have had him since he was 8 wks old. we do try the replacement sometimes there is not enough time to do so, like when he swallowed a hair scrunchie...lol not to be bad to my hubby but he seems to do better with me then with him, i seem to have a way with him that jeff does not. Today for instance he had gotten ahold of a pen, i was able to get it away from him where jeff was not. he is very stubborn when it comes to jeff...lol when we do the class jeff will be the one doing most of it, as physically im not able to, but we both will follow through with what he says. he really is a good boy, he means everything to me and to my husband, i know with some time and patience and lessons he will pick up whatever he needs to, he is very smart and it does not take long for him to get it the first time.