I'm sorry I can't be of more help, but I would definitely look for signs of mites or lice on the rest of your birds as Wynette mentioned. They can be really tough to see, a lot of times you can find them around the vent of a bird. It can sometimes be easier to see them at night with a flashlight, look at the vent.
Here's a thread about how to treat for mites: https://www.backyardchickens.com/forum/viewtopic.php?pid=635883#p635883
If you haven't wormed them recently, you might also try that. Many people use Ivomec as a wormer, but if you search BYC you'll find several different options/opinions on worming.
Good luck to you and your birds!
Here's a thread about how to treat for mites: https://www.backyardchickens.com/forum/viewtopic.php?pid=635883#p635883
If you haven't wormed them recently, you might also try that. Many people use Ivomec as a wormer, but if you search BYC you'll find several different options/opinions on worming.
Good luck to you and your birds!
