Guy, the horsey stuff is quite difficult.
You need to know a bit about conformation of the horse too - as this will help in getting a good 'pose' for a side on standing shot. Their legs need to be in such a place as to show the length of shoulder/rein, and also a good hock, also as you say, ears pricked - with the head not to high or too low (sorry for tech terms)
Can bring pics at next race meeting to show you if you like?
C
