I have a few pix I'd like to share so that ya'll might be able to help figure out what's up with my chickens. I have a rooster who is several years old and has been in poor condition recently (mostly due to cold weather and external parasite problems). He is recovering nicely now but we have noticed this whitish "stuff" on his comb. If I attempt to scratch some off, it seems somewhat raw underneath. We recently treated the whole flock with ivermectin and followed up with a few days of Red Cell in their water because they looked anemic (pale combs all around). All are looking better, just worried about this guys comb and one hen. She is about 18 months old. Her comb tips almost look like frostbite but they don't have high humidity in the coop and they have heat at night. We didn't see much improvement in her comb after the Red Cell... Any thoughts on these two is appreciated!