How do dogs tend to react to horses?

We're moving onto a farm and renting the barn out for horses. We have two GSDs, a Husky and a working Anatolian for a small herd of sheep. I would think the Anatolian would be fine with the horses, but I'm unsure of the others. The husky is an outdoor dog (by his choice) and loves to wander... is it likely that he'd nag the horses, or is it more likely that he'd avoid them? What about the Shepherds?