(This isn't a huge concern of mine. I'm just curious.) Our two RIR's are supposed to be able to tolerate cold. We live in Texas, where an occasional dusting of snow is about as cold as it gets. We've been thru one summer and they seemed to "pant" a lot and look for shade. (I know that this isn't that big a problem, seeing how they are alive after this summer.) Should I do anything next summer for them?