DarthLayer - definitely candle. I just had this happen last week. (where did my chicken go, why haven't there been any eggs lately??) I candled the day I found her and numbered all of them. I put her in solitary as well. This week I candled and there was no change in the eggs. They were all fertile, but she just wasn't doing her job. One was completely black inside...very close to becoming a stink bomb. I discarded all her eggs and let her out. She wasn't happy and her man wasn't either. The minute I let her out he ran over and did his manly greeting thing and had his way with her.
She was laying on 19 eggs and if I would have found her before the pile got that high, things may have turned out different. GOOD LUCK!
She was laying on 19 eggs and if I would have found her before the pile got that high, things may have turned out different. GOOD LUCK!