I know rats can't catch colds, but can they catch the sniffles? My fat boy, Cork had the sniffles and sneezes for 3 days, and is doing fine now but my little boy, Dublin now has them. He's also the one who had the upper respiratory infection that one time so I'm hoping he's okay. He's eating, but won't leave his igloo, when I first saw him I thought he was scared but now I can see he's sniffly. Anything I can do to help him? I'll run a hot shower for steam in the morning.