pasty butts

[Turkens13]

"I have a couple of chickens with pasty butts. What should I do? I've tried keeping them warm and always provide clean water. Any tips to prevent it?"

 

[horror_trashcan]

You can trim their butt feathers as well as putting some vaseline/oil on their vents. Is anything else about them odd or just the pasty butt? It could just be the weather.