causes of pasty butt

We have our queen of the flock, dorothy a barred rock that is coming up on 3 years old. This year she has dealt with pasty butt and we can’t get it resolved. Its been a rollercoaster it seems gone then comes back. Ive bathed her twice and tried yeast infection cream on her vent but she finds the...

I received 9 chicks from a hatchery, arrived USPS. After I brought them home they had super runny poops, and a few had developed pasty butt. I cleaned them up, and set them back in the brooder. They all started eating and drinking immediately. They seemed healthy, and lively. The next day they...