One of my hens has something going on with her crop... It's very large and hard and off to one side (the right) rather than centered. Her behavior is normal and she eats/drinks fine. Her poo is normal, she free ranges all day and I haven't found any out of the ordinary poo in the coop/run/yard. I checked the other 5 girls and their crops are fine. Any ideas what this could be? I can post pics tomorrow if needed, it's too dark to get pics tonight.