Do horses like cows?

Horses will generally learn to handle being turned out with cows. Horses from cow lines, though, may attempt to herd them (which might not be appreciated by the cows).

A few horses seem to be inexplicably afraid of cows. Also, turning horses out with cows increases the risk of attracting a fly that likes to lay its eggs under the skin on the animal's back - a problem when it's where the saddle goes...