My 3 yr old Rhode Island Red hen is looking terrible. Her comb is small and pale red, feathers on her head look like they are broken and her feet look arthritic - gnarly and fat. Her body feathers look messy and dull. She is not lethargic but does not join in with the other hens. She is eating and laying. I don't know how else to describe it ... she just doesn't look "right". Any advice would be most welcome.