I just moved this past weekend and have a three and a half year old Chihuahua. Since we live in an apartment and he is very small, he's been trained to go to the bathroom on a puppy pad and never had a problem at the other place. The first thing I did when I brought him to the new apartment was put down his pad and showed him where it was. Well, he's gone on it occasionally, but he's just as likely to pee on my brand new carpet too and it's getting really frustrating to come home and clean up dog pee every day. Any suggestions on how I can break him of this? He's too old for this and knows better any way!