I believe my month old sever pencilled wyandotte has cocci.... I bought her and her sister along with 3 keets at a feed store. One of the keets had an injured leg (they were on hardware cloth) so I got it and two others for company and the two chicks to help the keets. One keet had an irritated looking vent and died the next norning. The injured keet was nearly healed when it became lethargic and died. I did not notice any other symptoms. Tonight I found one little pullet dead. There was some bloody poo in the box. My other pullet is showing all the symptoms of cocci. My remaining keet seems fine. They have been on the standard medicated feed and I have started Duramycin in the water. I have some vitamins but it sounds like I should hold off on them. Would diatomus earth help? I also have Nutra Drench. I have EE's outside that are a couple of months older are they still at high risk?