how did your horse get hit by a car? is it skunk?
a horse once hit a van we hired to move house, the horse was fine but the van wasn't

horses rock.
No it is't Skunk, it is Bob he is black with a white star just like Black Beauty

Anyway there were 4 of us out riding one day and bob was at the back, car just came flying up behind us and hit bob in the ribs, claimed he didn't see 4 big horses, riders all wearing high vis clothing and on a straight bit of road.
Before I get stick for riding on the road, we had 200 yards to go on the road from the field to the bridleway on a quiet country lane. It was touch and go if he'd survive then, the car broke his ribs and punctured his lung and I sat wth him for a whole freezing cold January day making sure he didn't die. The police wouldn't prosecute and made him go on a driving course.