We were gifted 3 hens after we lost one to a hawk. We put the 'new' 3 immediately in with our 3 (color us newbies stupid, I know!). We should NEVER have gotten the 3 hens. I looked at them at first and thought 'what rag-tag hens!' they were in molt, had trimmed beaks, one yawned not always, but on and off, their feathers looked dull & ruffly, and the hens thin & small, not socialized. In hind sight- ALL warning signs, I know now. Plus the farmer didn't know how old they were and assured us they were healthy and were currently laying eggs. I will post a picture of us because you will then know what stupidity looks like- chicken are NOT like dogs from the pound! (gotta stop with the 'rescue' mentality!) We had the 'new' hens 2-3 weeks and killed them all yesterday after one had bubbly eyes yesterday morning. She kept sneezing but with no discharge and I had been noticing she didn't eat the treats (salmon to help their feathers grow in faster) I gave them almost daily. So, my question is this: how should I treat my hens & when? Is there an order? Should I wait until symptoms show or act pre-emptively (if there is such a thing in this situation). They are very healthy and active, but they lived with the others for 3 weeks . I am concerned that we have planted a time bomb with our babies. Which is most important to do first? antibiotics? sevin powder? diatomacious earth? We cleaned out the coop thoroughly but I know that's only one part of what I need to do. Guidance appreciated!