Check out coccidiosis online too.
If it were coccidiosis, the whole flock would be dead.
Chicks or grown laying hens, you gotta keep their rear ends clean.
You can buy antibiotics to put in their water.
I'd start there.
Make sure they have fresh, clean water....EVERY day.
We have a population of redtail hawks here in southern OK that's unbelievable. I had my laying hens in a covered pen.
I never fed "laying" mash or pellets*. Just plain feed. If your chickens are healthy and well fed, they will lay.
I hung one of those 5 gallon game feeders full of scratch grains from the top of their run.
It was set to run twice daily.
Their prepared feed was in a gravity feeder inside their "house", out of the weather.
* - laying "feeds" only provide more calcium to promote shell formation and doesn't really stimulate egg production. I fed crushed oyster shell, free choice. Same principle and gives them "grit" for their crops.
