I applied vaseline on my chickens' combs and wattle 2 weeks ago when temps were dropping to the 20s. They have been doing very well, without problems. This weekend temps will be dropping down to the teens. Should I re-vaseline? How frequently does one need to apply vaseline anyway? I can't imagine the vaseline disappearing anywhere, and the chickens sure can't eat it. I have 3 red stars and 1 black star about 5 and 1/2 months old. My first batch of chickens, I applied vaseline once, and left them alone for the rest of winter. They did fine, until the raccoons got them at spring thaw. By the way, these chickens love having the combs and wattles massaged with vaseline. It almost seems - huh - like they are in a happy trance/ecstasy.... Wassup wit dat??