What would cause a chicken to lose so much weight? I suspect parasites but don't know what to do, we are diligent about keeping vinegar in their water but over the last year I have lost 4 hens and now my roo is lying on the floor of the coop. He has been eating and drinking like crazy and even this morining when I found him on the floor he is eating and drinking, I picked him up and he is nothing but feather and bones just like the others I lost. I am beside myself, he is my favorite. I just don't get it, none of the others seem to be losing weight, it happens one at a time. I read cayenne is a treatment for parasites so I am going to mix some with his feed but does anyone have any other suggestions? They all eat oatmeal and layer feed as well as all kinds of fruits and veges on a daily basis. I gave him gatorade this morning when I found him which he drank a lot of as well as oatmeal and layer feed.