I am potty training my 3 month old maltipoo, Barkley, in a litter box. When we go into the bathroom, he pees in the box no problem. But I can't get him to do bigs there. I put his leash on and tried to gently guide him into it when he circles and starts, but he just stops cold. It's not easy to take him outside as we live upstairs. He doesn't seem to want me to look at him -- what's up with that? I put a little fence around the litter box and put him in there while I was getting ready myself (in the bathroom) but he just sits there.