My Marans roos, and a few hens, get frostbite too. The wattles are because they drag in the water when they drink, and the comb (I am guessing) it is just so big and the boys don't seem to know when to rest and put their head under their wing. my experiance with frostbite so far is to keep and eye on it but..... it healed well and the animals did not get it the following year because they had smaller combs and waddles.
Thanks Keara! This is my first winter, so I'm still getting used to the challenges that go with it. I am also more inclined to just let things be and only intercede if I see something serious, so I'll probably take the wait and see approach unless I see a lot more start or the hens are affected too.
I'm watching my 4 leghorn hens closely, since they roost 8' up near the soffet vents (and have the biggest combs of all my hens), but see no signs of frostbite on any of them. I'm getting 6-11 eggs a day from 18 hens (2-4 a day from my 5 BCM's), so I'm pretty happy with their winter laying rate and they all seem healthy.