I came home today and my 12 week old Yorkie puppy Sam had a big bloated belly! He's drinking water like crazy and seems to be getting tired more easily. He was energetic and playful for a bit and then he just conked out and slept (even though he's been sleeping pretty much all day so doesn't really need the rest). I called the vet and the soonest I can get in is tomorrow. Has anyone had this happen to their dog/puppy? Should I go to an emergency clinic or wait it out? I'm afraid he may have bloat (although I know it's mostly seen in big dogs) or something serious!