I lost a silkie a couple of weeks ago. Super thin in spite of free range and unlimited feed. Sent in for necropsy and the results are not in yet. No worms according to the vet, but I'm not sure which worms they tested for. They are an avian vet but I don't think they see many chickens. I now have at least 4 other birds with the weight loss! Who know how long the weight loss has been going on. I didn't know to check it before and I can't say that I actually knew what a thin chicken looked/felt like before now. The feathers really hide it. Rookie mistake. :-( I changed their feed today hoping it could be food related. Then one of my girls didn't go in to the coop tonight. We found her under the coop kind of spaced out. Very thin! I brought her in and fed her cooked eggs, yogurt and olive oil soaked bread. She acted STARVED even though her crop was full!! (not impacted, i checked about a week ago). Her feathers are a wreck. I thought she might be moulting. It actually looks like part of her comb is darker than the rest. Would this be possible? Part of it looks blueish/purple. Not black like pecking spots, just kind of discolored. I decided to bring in each thin bird individually and bathe them (poopy butts) and feed them the same olive oil, egg, yogurt treats. Same thing, full crop acting starved. After this, at least two of the birds pooped regular poop, but in a pool of water. What is that?! I also have at least 3 birds laying soft shelled/shell less eggs in spite of free choice oyster shell and baked egg shells ground up and put in their feed. 3 new birds were introduced about a month ago. One of the new birds is sick. The other two are fine and they all came from the same flock. Very healthy happy girls. I also keep catching the local wild birds flying in the coop for the feed. I have to fix that, I know. No other chicken owners come to my house. No other chickens near by. Can you guys please help? I do not think the vet is going to know what to look for in spite of the billion dollars I just gave him. Could it be cocci? What about that purple comb? The silkie went SO fast and I'm really worried. Please help! Thank you!