I have a sultan hen with a very injured leg. I don't see any cuts or swelling. If I run my fingers along the bone I can't feel anything that feels broken or out of place but she seems to be in horrible pain. This started Friday evening and I kept thinking with time alone away from the other birds it would heal. It doesn't seem to be getting any better. She won't put weight on the leg at all and when you touch it she shutters. (Actually it sounds like a cat's purr but that's not a good thing in a chicken) Last night when I went out to check on her... after dark... she was shuttering or purring with every exhale. What should I look for that might be something I can fix? How long do I wait? If I can't fix it, how do I know when she's in too much pain? This is horrible. I definitely can't do the unthinkable. She's a pet, not a fryer... Help!