The whole issue of horses and low flying aircraft interests me. I work for an air ambulance and am regularly called out to attend horse riders.
I tried coming up with some stats but couldn't find anything apart from a snippet from a BBC website.... What i would say though, is that infrequent low flying military helicopters are the least of horse riders problems
http://www.bbc.co.uk/pressoffice/pre...3/riding.shtml