This EE hen is about 6 years old. She's always had rather runny poop since she was a chick, and lately I've noticed she's been drinking a lot, and I mean a lot, of water when I let them out early in the morning. This morning when I opened the coop I noticed her crop was really full of water, when it should've normally be empty. It's been about 6 hours and it has deflated a bit, but it swings when she runs. She seems to have lost some weight, but she's still very active, eating well, and even laying. I've been massaging her crop gently to see if that helps, and I haven't noticed any sour smell from her beak. Is this normal behavior, should I worry about it becoming something more serious?