We went to the vet yesterday and got there a little early. Muffin screamed the whole time in the waiting area. Our vet is an emergency vet as well, so there's exotics and other pets. I kept apologizing to the other people there.
Dr. W thought Muffin looked good. On the surface he couldn't see any problem with Muffin except that he is a little overweight at 109 grams. He mentioned that at Muffin's age, kidney and liver problems become apparent. I was concerned that he was going to be losing weight with all the plotzing. Dr. W took a poop sample and we'll get the results by Wednesday and see what the problem is there.
I was able to buy PediaLyte in a small bottle and I put a small drop on some oatmeal for him to eat. Things did look a little better after that.
I was home most of yesterday and Muffin's poops were totally normal. I don't know if he's experiencing anxiety during the day or around the time I come home. He's been so active that it would be hard to say there is something wrong with him :-D I am going to see if we can set up an old cell phone as a web cam so I can see what he does all day :-D I feel less worried now that we've been to the vet.