My 3 year old chihahua terrier has suddenly started peeing everywhere. She has her own room (and wee-wee pads as we cant take her out during the day) and mainly does well. But at least once a day she pees on our bedroom carpet.
crate training,,make sure to get one that is big enough ,but not too big because she will just pee on one end of it.she will cry a lot,,but while you are gone it is the best way.as soon as you return take her out to potty & praise her & give her a treat as soon as she pottys.