We have a two-year old Lhasa Opso and a PetAPotty. We've had the potty for two months, and she hasn't pooed in it yet, but she pees in it several times a day. We have to take her outside for #2, or she'll do it on the carpet a few feet away from the potty. There are times when we know she has to go BAD, and we set her on the potty, saying, "Go potty!" and she just sits there. We've sat there for 40 minutes once. Then, take her outside, and BAMM - she goes. Anyone have any ideas on why she isn't going #2 on it? (It used to have sod, now it has artificial grass, but she went on neither...) Thanks!