Do have a buddy for her, that wont run around ? is she calm, and if turned out will she just mosey around and graze ? if she wont be running etc, i would get her a calm lazy buddy and let them out .Our older TB mare was lame, she must have fallen in a squirrel hole in the pasture , her leg was swollen from hoof to hip, her hip bone sticks out at an odd angle. Hubby did not want her put down. We just wrapped her leg from hoof to as high up as possible, wrapped the other hind leg to give support, fed her some bute, and left her alone. She will still gallop 3 legged once in a great while, but she is turned loose in an arena with her boyfriend who is dependent on her as he is blind in one eye so they really dont gallop , just stand around , roll eat .