One of my new hens was having trouble walking this morning. I looked at her feet and they looked and felt like dry oak twigs. Black and completely stiff. I brought her in to warm up and have soaked her feet a couple of times in warm water. The bottoms of her feet now have some pink and soft skin but otherwise they are still stiff, and a bit of skin fell off the last time I soaked her feet. She's standing up but is obviously not using her toes to balance. I read up on frozen feet here but from what I read I'm afraid they might be too far gone. Any advice or suggestions?