Er, Guys,
Not to be --crud, I just forgot the word-- a know it all, (mainly 'cause I don't) you all do realize that horse come in different sizes, right? "Pedantic", there it is. There are tall horses, short horses, ponies, blocky horses, skinny horses, and even an awfully lot of the very rear end of a horse running around. Percherons are humongous. (They pull the Busch Beer Wagon--quite a few are alcoholics, an embarrassment to the company.) Then there are those critters called 'mustangs' that are runty and tough. All you need is a horse that is of reasonable altitude for the guy standing with him.
And Torby, you're right about dragons grazing with cows. I usta have to throw rocks at 'em when I went to get the cows in for milking. Sometimes it was a hassle. They only breathe fire in the springtime when the garlic is coming up.
Les