SHELLY, be sure to look EVERYWHERE that she could possibly go. I had a hen come up missing one time and I thought something got her, but a week later I saw her out with the other chickens while I was mowing. Well, I made a few more rounds on the mower and looked over and she was GONE again. Right then, I decided she had a nest somewhere and began looking all over. Finally, I found her up under one of the bushes by the house sitting on 17 unfertilized eggs (I had no rooster at the time), so I went and got sme fertile eggs from my friend and put them in place of the unfertile ones. 3 weeks later we had chicks. Just make sure you look real good, because there's not many predators that can snatch a chickens without pulling some feathers out.