Suddenly my 19 wk old PomChi has started having "accidents". Maggie has been pad trained since she was 6 wks and has done amazing! But all of a sudden she is peeing off of her pad. She has started going outside now that she has had all her shots and the weather is warming up. But still has pads in her pen where she stays at night or when we are not home. I am not sure why this is happening all of a sudden. She will go into her pen and go most of the time but then she will go somewhere else. The only thing she is consistent with is where she poos.