thanks guys for the suggestions - I especially like Arrow's suggestion. We don't have to introduce them until two weeks time but I'll be thinking of the best place/time/way to do it so any more suggestions would be great :-D
Btw, to horses often badly hurt each other in these introductions? I get rather freaked out because of all the squeling and striking and chasing but no horse seems to get hurt more than a few scrapes. Is this fairly typical?
When I bestride him, I soar, I am a hawk: he trots the air; the earth sings when he touches it; the basest horn of his hoof is more musical than the pipe of Hermes. ~William Shakespeare