I went outside to put together a new roost for my chickens, and I noticed that my BR roo has a black tipped comb. I don't know what the heck is going on, since none of the other chickens have this problem. Here are some pics, just wondering if anyone can identify a problem. I read this thread https://www.backyardchickens.com/forum/viewtopic.php?id=75342 and it kinda sounds like what may be going on, but I want to run it by you all first cause I would hate to jump to conclusions just to find out there's really something wrong. Thanks!!!