Yesterday afternoon, after getting a funny feeling, my husband went out to the coop to check on the girls. Good thing he did. We used a row of masonry construction blocks to set our feeders and waterer on to help keep poop and shavings out of them. Our Barred Rock hen had, for some strange reason, tried to go through the holes in the aligned blocks. Needless to say, she was hopelessly stuck in a very small tunnel. It took my DH several minutes to get her out. He had to move the heavy blocks away from the wall, but keep them somewhat aligned to keep from hurting her. When he did get her out, her comb was bleeding and she couldn't stand up. He held her and petted her until she regained some of the use of her legs, and then kept the other hens away from her bloody comb. Fortunately, she has recovered fully (well, except for her comb -- it looks pretty rough). We closed off the end of the blocks so it wouldn't happen again. We have no idea why she would want to crawl in there. Maybe she thought it was a nice, dark place to lay her egg. We're very thankful that my hubby felt a need to go check on the girls. We don't think she would have lived through the night. Please check your coops and runs and make sure you don't have any small spaces that your chickens could get stuck in. We would have been devastated if we had not found her in time.