I'm worried that it's an egg issue. Last egg was Tues & it was an odd shape. Didn't think much of it then. Her feather shafts, legs, & skin look OK. Her crop doesn't feel hard. Not sure what sour crop would feel like. While on my lap last night, I put her on her side to check the vent. She put her head down & some clear liquid came out. I read that it should smell nasty if sour crop, but it wasn't a very strong odor. She's not making weird head movements today, but she did a few last night when I tried to give her Tums. (Perhaps the taste or surprise because I hid it in food.) Still leaning toward an egg issue b/c of the heavy feeling in her gut.if not broody and not egg laying issues, my next guess would be bugs. Not so much lice as those eat feathers and are not blood suckers. But fleas and mites, mosquitoes, pestering gnats,... if not bugs then maybe mice. Anything that could be decreasing her blood supply.