Welcome to BYC. Sorry about the loss of your hen and your rooster's frostbite. The best way to get chickens to go in at night is to look them inside the coop you want them in for up to a week 24/7. That way they will know where home is, and always lock them up at night when they go in to roost. Maybe you have too many choices, and they don't know which to use? Here are 2 good links about frostbite:My Leghorn rooster, Foghorn has terrible frostbite on his wattles and his comb. I just read about putting neo or vasaline on him which I'll do in the morning. I don't understand why he wouldn't go inside his house, he's been sleeping on top of it. Tonight I put him inside and blocked the door so he couldn't get out till morning. I also found one of my hens dead, I'm assuming she froze to death. Again i don't know why she wasn't inside her house last nite. I feel terrible about my chickys being in the unusually cold air but they have 4 houses of various sizes to get inside of. Each one had plenty of hay inside and there's plenty of room. I have 2 roosters and now 6 hens.![]()
http://www.the-chicken-chick.com/2013/12/frostbit-in-backyard-chickens-causes.html
http://voices.yahoo.com/how-treat-chickens-suffering-frostbite-5294027.html?cat=53