i have no clue but if she is eating,drinking,acting normally she must be ok maybe she just lays eggs like that here is a thread that may help=https://www.backyardchickens.com/t/112141/pullet-bullets-miss-prissy-speckled-help/10
can i see pic's is he eating,drinking,waddling. Add sugar to his water to give him more energy. i found this site that might help you = https://sites.google.com/a/larsencreek.com/chicken-orthopedics/
we have a chick named gumby he has a red swollen butt and hes seem to be fine he has water & food and he act's healthy so is this something to be worried about is it life threatening he had it yesterday and he still ok now so i have never dealt white this so i have no cule and we put vasline on...