2 year old Golden Laced Wyandotte isn't doing well. This has been going on for three days. She's lethargic and tonight not even interested in scratch when I gave the rest of the girls a treat. She looks like her tail feathers are trying to point down toward the ground rather than up and, overall, she looks like she's puffed up into a ball--like she's having a really bad hair day. I thought maybe she started a molt but something about her eyes doesn't seem right either. When everyone else is running around, she's inside on the roost, often with her head tucked back into her shoulder. I looked at her vent--some small amound of dried white poop on the feathers underneath. I didn't put my finger into her vent, but I thought that if she was egg bound she wouldn't have lasted so long. I've checked her crop but it doesn't seem squishy or unusual. Yesterday it seemed filled with feed. Tonight it didn't seem to have much of anything in it, but I could feel some gravel-like feed if I really pressed on it. I can't think of anything that's changed about how the flock is treated except we had a bad snow and they haven't been out of the run for a week. The coop is insulated and I have a heat lamp with a red bulb hanging over the waterer so the water doesn't freeze. I have a panel heater set on a thermostat so the coop doesn't ever get too cold. The flock totals 7 hens. Three months ago I let a broody comet hatch some fertilized eggs. Three roosters and a hen resulted. So total of 11 birds but integration didn't seem to be a problem. Something's wrong with this girl and I can't seem to put my finger on what it is. She just doesn't look or act right. Any ideas? Thanks in advance.