I have two plymouth rocks. I have a thread on my one who’s been having many problems one includes her toes curling not her nails her entire toe curls. (Nails are cut short). Took her to the vet and doctor said she’s healthy and fine possibly just her being lazy and spoiled. My entire flock is 4 turning 5 next March. Now my other Plymouth I just noticed the knuckle parts on her toes and bubbles up. There hard. She has been laying around a lot. I’ve seen her eat and drink but her crop is empty. She was pale in the face yesterday but I figured it might be the heat and today she seemed fine no paleness just layed down. The pictures are of her feet. But it’s only my plymouth rocks that are doing this no other breed in my flock is having problems. I got the PR (2) from Tractor supply when they were chicks. They both stopped laying. Could it just be old age?