Why is he lying on the litter?

When it comes to dudu, it is really endearing. Dudu is so funny when he sleeps. Sometimes its legs in the air, like a fall upside down, closed its front legs, stand a big belly, a drum drum, slowly fell asleep; Naughty when the feet close forward a stretch, with the hind feet when sleeping mat, mat under the body pulling snoring, whooping sleep, uvula exposed outside; When angry, four legs together, the body curled up, rolled into a chocolate colored ball, rolling to and from, very attractive. I just wanted to pick it up and give it a little pat.