My friend had 7 chickens. She told me one chicken was losing feathers, and we eventually found her dead. I took the 6 chickens she had left. I know they have scaley leg mites so we bathed them, scrubbed their feet with apple cidar vinegar and anti bacterial soap, and coated them with petroleum jelly. We rubbed diatamacious earth all over their body and put 4 drops on each bird of ivermectin to treat internal worms they might have. We've only been rubbing jelly on their legs once a week though. Today marks their second week since they have been treated. They are due to get treated with ivermectin again, when I went out there today, I found one of them dead. She rarley laid eggs from what my friend told me, but when I brought her home, she did pop one out from stress I guess of the move. I checked out her skin and feathers and she looked like a pretty healthy chicken to me honestly. So I'm wondering why she died. Also, another chicken (the one with the worst scaled up legs) is still having diarhea. They've been eating commerical layers food.