I have had 2 of my chickens just disappear in the past 2 days. One was my Old English Game bantam and the other was my Isa Brown. I let my chickens free range. I don't understand it because there is no sign of them, no feathers, no nothing. What could have taken them? I have my chickens locked back up in their run until I can figure this out. My other question is should I just let them back out to free range or keep them locked up. I know they don't like being in their pens and want out, but I don't know if it is safe anymore.