I have a 19 day old orphaned mouse. He has a little fur, and his eyes are soon to open. About two days ago he stopped going to the bathroom. I have always rubbed his bottom with a warm-wet cutip/cotton ball, and it has made him go untill now. His stommache is quite large, and I can see that orangey color through his skin, which I'm sure is the backed up waste. I have still tried rubbing him and even dipping his bottom in warm water. He will pee maybe a drop or two, but no poop. I am very worried. Does anyone have some advice?! Please!