I noticed when feeding one of my rabbits that her ears were stiff and cold. She's playing in the living room now. I know Mini Rex have less fur in general and we've had an unusually frigid winter down here in AL, so do you have any suggestions for keeping frostbite at bay? I know petroleum jelly is what you use for chickens, but admittedly I'm pretty sure the rabbits would lick that off and it wouldn't end well. Suggestions?