There is a mare on my yard who was the recipient of a kick in the feild, resulting in a fractured splint bone (in her off side hind i beleive). This occured about 3 weeks ago, shes undergone x-rays scans etc and got the diagnosis - altho doesn't require surgery (i think its only minor).
Mare is a fiesty little thing and has been on constant box rest all the time, doped on ACP (she would be killing people if not!) - Apparently her prognosis is good, but its unlikley she'll be riden again (she wasn't what you'd call a horse worth her weight in gold (i think more like, if you can stay on more than 10 minutes your a good rider!! )) And so i think her owner is going to have her put in foal next year, should be fun.
Thats all i can say from our experiances,
Good luck and hope it goes well!