Hi all, I got chicks for the first time two days ago. Five out of six seem to be doing well, but one (black sex link) has had to have her butt cleaned off several times already for what looks to be the start of pasty butt. Tonight, when I checked on them, she also had some red, raw tissue above where I had to remove the stool. I'm not sure if the stool dropped from this hole and got stuck on her fluffy feathers, or if the other chicks are pecking her in her backside and creating a whole new hole (gruesome, and I feel ridiculous not knowing what I'm looking at). She is a bit smaller than the other chicks and seems a little out of it, but chirps loudly when held and is eating and drinking. I'm not sure whether to separate her from the others, or what else to do. I'm about to go put vegetable oil on her backside as suggested in other threads. Any other advice would be welcomed!