I live in East-Central Indiana (Greenfield) and have lost 3 hens within a few days also. 2 of them went missing in one night with no trace of feathers or a struggle, just gone. the 3rd hen was taken by something last night while we were gone. All of my chickens are fully enclosed in runs with chicken wire on top also. I have heard of people stealing Silkies before, oddly enough, all the hens that were lost were Silkies. I know we have raccoons because they pick the ears, schuck and eat the corn off the cobb, then leave the cobbs for me to look at each morning. I am going to set a trap tonight and see what happens. Could it be any other predator?