Well, I can't diagnose what your chins has, but it sounds similar to something one of mine had a couple months ago. I noticed he was pooping these tiny poos and had Critical Care and Lifeline on hand (which I highly recommend you have at the ready), so I mixed up a slurry, added more powdered acidophilus and hand fed him every two hours until he started pooping normally again, which took a day and a half. I monitored weight and gently massaged his belly to get the poop rolling again. After a day of normal pooping, I slowly weaned him off as he started eating pellets again. If yours stops pooping altogether, you could consider seeing a vet.