Yes we had 6 buffs until the coyotes came calling, now we have three with 1 in pretty bad shape. Doing all we can for her as they are like our children, but afraid we might loose her..Eradication coyote has begun on the S&S farms here in Kansas.
Chickens generally seem to have great recuperative powers - shock and infection seem to cause most losses. So please check that the wounds are not infected and that flies have not laid eggs in the wound. The resulting maggots are worse that the original injuries. Injured birds do need to be isolated from the flock because chickens will attack wounded birds and even resort to cannibalism.