This is my first winter with chickens, so I'm learning. I'm going away for the weekend. I have someone to come and check for eggs, and their food and water is already taken care of. I noticed that my rooster's comb is just a TINY bit swollen. It's not black or anything. My question is: is it okay to leave for 2 days, or do I have to tell the person watching them to treat his MINOR frostbite?