About a week ago, my Bantam Partridge Cochin Pullet went exploring when it was icy, snowy, and cold. When I found her, her poor little feet were balls of ice. I rinsed them in warm water and dried them, then put her back out (in a nice warm coop and a lot of hay.) She hadn''t been moving much, but I thought she was just broody. She has frostbite on her toes. They are brittle and black. Is there anything that we can do for her? Lacy is a pet and was a possible showbird, but I realize there is no hope of that now. Please help save my chicken! P.S. we have coated her feet with antibiotic. she is in a nice warm place with lots of bedding.