One of my chickens has a bad foot that curls up and she limps. The vet(dog,cat) didnt know what was wrong with her but gave her an anti-inflammatory shot and said nothing was broken. She has managed for 2 years like this but sometimes her other foot is affected and she can barely get around. I thought it was cold weather related but today out of the blue her other foot curled up and she is almost immobile. She gets beat up because of this and has spent months living in our house waiting for warmer weather. This has happened before and her good foot gets better in a few days...any opinions?