About 3 weeks ago one of my chickens just didn't seem to feel well. She just wanted to lay around and wasn't really eating. I separated her and brought her to the porch in a separate pen. I started giving her pedialyte. I noticed when I picked her up that she has either mites or lice. We immediately went out and bought dc earth and placed it in a shallow tub and gave her a dust bath. Leaving the tub in the chicken run. after a few days she started feeling better and we returned her to the coop. Fast forward another week and I noticed several of my chickens was getting sick. They are coughing, sneezing and crusted eyes and nostrils. I was searching all over the internet what it could be for 2 days. All of a sudden I realized all this started when I had cleaned out my coop. I didn't know that you could not use cedar bedding for chickens. My husband and I immediately went out and took all the cedar out. My chickens was still gasping for air and crusty eyes. We thought gapeworm. We gave all the chickens a dust bath, cleaned their faces with warm water, used vet rx on comb and nostrils and added safe guard wormer to their water. We also added another water bucket with pedialyte. After that we pressure washed the coop down and lade all new straw bedding, we turned over the coop sand and put barn yard lime down. Someone suggested la 200. I was really scared to do that but I did give my sickest 5 the injection. All died a few days later.. My chickens have still been sick and im losing more. I have added flock fixer now to water and no more wormer or pedialyte. I was told to start them on a antibiotic so I ordered Levamisole hydrochloride anthelmintic from ts and it should come tomorrow. What else can I do to save my chickens?