Over the last 3 weeks I've had 4 chickens that have had their faces eatin off? I don't understand whats going on. First it happened with a younger Black Silkie (maybe about 5 months?) He was in with with all White Silkies and a younger Lavender Silkie. I had first thought he was picked at but theres no blood or anything in the coop! AND the white chickens had NO blood on them. He was still alive and drinking/eating etc. Walking around just fine like nothing happened? Then my other pen of BBS had a Blue Silkie die yesterday (shes the only one that died, the others I put down) and this Blue Silkie died between 1pm and 8pm because I personally went down to the coops. Then this morning my younger Lav Silkie that was in with the Whites...her face is missing. I took pictures and I just don't understand whats going on!!! NO blood, no featherS, no beakS....NOTHING! The little Lav girl is the only one that had a LITTLE blood around her..but not much at all! I'm going to have to put her down because I don't even think shes able to eat. I don't see a tongue or anything! Her one eye is swollen closed/infected. Please help me!!!