I woke up this morning to find one of my 5 month old hens heavily limping. She was absolutely fine yesterday if not a little antsy about laying her egg. When I looked at her today she could barely walk. I've checked her foot and leg, she doesn't struggle or pull away or show any signs of pain when I move it. This happened to one of my other birds about 5 months back, where she was fine one day and falling over on her side the next...she later died. I don't think this is an injury, I'm worried its a sickness. Her poop is watery and green. Could she possibly be egg bound? I'm at a loss and under alot of stress, I can't take her in because I may have covid. If anyone has any ideas it would be greatly appreciated