HI this is my 1st post, I have 14 pullets and 2 roosters. My chickens are 23 and 24 weeks old. I have buff orps, BR, RIR and Red rocks (24 weekers). None of them are laying eggs yet. Yesterday, I went out to check on my chickens and one was missing the 24 week old red rock, I went looking for her and she was in the nesting box. I was so excited because I thought she was going to lay her 1st egg. She was in there for a while, she came out and put pine shaving on her back ( is that normal?). She also drank a lot of water. She came out of the coop and we went in to see if she laid an egg. NO egg. Her comb and waddles are really red and big and have been for a couple of weeks. I kept her in the coop a few days ago to see if she is laying but no egg. Her pelvic bone is only 2 fingers wide. Her vent looks big to me. She is also doing the egg song. I go out to see her and NO egg. Any suggestions.... Thank you in advance!