Let me start my saying that I'm an RN, and the current catch-phrase/craze in the nursing community is "evidence-based practice." It turns out that a lot of medical "fact" and practice is just custom, and when tested, scientifically, does not prove to be true. So when I read this in YukonChicken's cold-weather post, I had to agree: I am now going to ensure the three have lubricated combs... although it still seems a bit 'wrong' to me - wouldn't this process assist in wicking away heat from the comb? hmmm... I've always thought the same thing. You're putting moisture on the comb. When moisture evaporates off a surface, the surface becomes cooler. I did a google search of "vaseline AND frostbite." The only hits that came up were chicken-related. You'd think if it were true, other people would have caught on. Here's a quote I found, from someone living in Maine: Another concern of cold weather is frostbite. Single comb varieties with long wattles suffer the most. Some believe that massaging Vaseline into the comb will help prevent frostbite. I've tested this and found no evidence that the roosters who received massage and/or Vaseline fared any better than those that didn't. Another chicken owner: I read in our chicken owners manual, Storey's Guide to Raising Chickens by Gail Damerow, that rubbing vaseline on their combs would help prevent frostbite, so we've been dutifully massaging on the vaseline, but I'm afraid they've experienced some frostbite. So, I'm wondering if anybody knows of any real research on this subject. I'm hesitant to put Vaseline on my girls, because my gut tells me this is myth. But, if my gut is wrong (which it has been known to be), I'd like to be corrected--for the sake of my chickens. Edited to add: I'd love to hear your personal experiences, too.