I'm visiting my mom and I brought my two rats with me. I've done this before and they've done fine. Today, however, I've noticed that one of my boys, Jenkin, seems sick. He's very lethargic and his breathing is heavy. I'm assuming he's stressed, or perhaps had a small URI that went unnoticed until now. He will still take fruits and veggies, but I haven't seen him eat a block today. Is there anything I can do to help relieve his stress until I go back home? My mom has cats, I don't know if it's the smell of them that's making him nervous or what.