I have a white leghorn hen that I believe has an illness. Her feathers have been ruffled for about a week and I thought she was beginning to molt. However, today, she clearly is having trouble walking. Her toes do not stay straight when she takes a step and she basically bends her claws and almost falls when moving. She seems to want to stay close to the waterer though she doesn't appear to be drinking or eating much. She had a greenish-colored mushy poop. Her comb is not dry and her eyes seem fine. Any ideas? Thanks in advance.