wish i could help but seeing as how my cat doesn't have a litter box i'm no help at all......yeah i trained my cat to go outside to bathroom...does he do this when their is other fical material in the box...if so, it could be he is just being picky.

hello, well the only thing i could come up with is if you have a treadmill....you could put the pooches on their leash turn on the treadmill and let them have a little indoor run...nothing too fast so it won't hurt them but enough to give them the ex...