While the young man clearly knew horses well, so did most of the men in the party, including Dougal himself.

He knew horses, and he'd never seen anything like this.

He'd known difficult horses before, and this one would be a handful, no doubt about it.

He knew what would be inside even before he saw them: horses, of courses.

I knew vampires the way some people knew horses, or cars.

You don't know horses, there aren't any on Capitol anymore, more's the pity.

I don't know horses well enough to say, but their legs, too, seem longer than usual.

But your big asset is that you know horses.

I've known horses I could read like a book.

And with them not knowing horses, they would maybe have got a bit scared of him.