I've lost probably a dozen young (20 weeks or less) dual purpose chickens over the last month. They free range during the day. Think they are disapearing at dusk, but that's just a guess. I've found no plucked feathers, no blood, no remains, I'm just short a chicken when I go out to lock them up for the night. I've seen a coyote in my yard, just not sure if they carry the birds off or eat where they catch them. We've got coons, but i've seen their handiwork (blood and feathers and dead animals just lying around) We've got possums, skunks, owls, hawks. But I don't think its them either.