My cat uses the litter box, always, but he doesn't seem to be able to finish his business in there. Every day I'm cleaning cat poop off the floor. I've got him eating Orijen for dry food and usually give him something wet every other day or so. I've just started adding probiotics to the wet food about a week ago which really helps with the smell, but does not seem to be helping with this lingering poops issue. Any ideas what may be causing this? It seems to make him quite uncomfortable, as I imagine it would.