Hey my axolotl hasn't been right now for a long time done everything we should water is right ect. But something isn't right. He's eating ok, but is very swollen and has been for a while now, and I don't think he's going the toilet as we can still see it inside him and have been able to see it there for about a week and a half now. Also is very red by his bum. Pleaseeee help!!!!!!!!