flock consists of 4 chickens about a year old, and 6 chicks between 8 and 12 weeks. I haven't wormed these chickens. Two of the older hens have scaly leg mites, I've been treating them for about 8 months - it gets better, and then they come back. These two are mutt chickens with feathers on their legs. I haven't tried ivermectim for the leg mites, just oils of every sort and last week I resorted to WD40 which didn't seem to do anything. Another of the older hens seems to have raggedy feathers and I'm thinking feather mites - she is losing her feathers on the sides of her neck and her bum feathers just look scraggly. She is also on the thin side, despite being a voracious eater - so I'm thinking worms. She is not a healthy chicken, she has reproductive oddities and wheezes like crazy - I got her when she was about 3 months old and she was wheezing from the start. But today I noticed she is getting thinner. Does it make sense to do this: first, treat the whole flock with wazine, wait two weeks, and with the pullets repeat the wazine, and with the older hens do the ivermectim - the drops on the back of the neck? Or should I put off the worming, and do the permethrin instead? and if I dust with permethrin, how much do I put on the hens? and can the chicks tolerate the permethrin? I am assuming I should do both worming and dusting at the same time - thinking it would be too stressful on them. What do you think?