Just found one of my hens holding her leg up and hopping around. Hanging out near the stables so possibly been bumped by a horse, but I'm not sure... Anyway, there's a bit of blood on her leg just above the ankle area, and the foot is swollen up and feels limp. No twitching, no reflexes. Just hanging there. Is is most likely broken, and if so, what's the best thing to do about it? Is it treatable? Splint? Or would I be better dispatching her quickly to avoid any unneccessary suffering? I've brought her inside and sat her in a box while I decide what to do next...