Have any of you ever heard of such a thing? I have two 10 week old guineas outside and I introduced my 6 week old chicks to the coop. I watched them for a while and of course they pecked at them a little, but pretty soon they were walking past them and I thought everything was OK. Later I looked out the window and I could see the guineas standing in the corner, but no chicks. I kept noticing this for about an hour so I went out to check it out. The chicks were all huddled down under the brace of the coop and the guineas were standing in front of them. If one of the chicks tried to get out, the guineas pecked them! I shooed the guineas back w/ a broom handle then watched. Sure enough, when the chicks started coming out, those guineas came and herded them back into the corner and stood in front of them not letting them out!