Are roses, specifically Knock Out roses, any danger when planted in a horse pasture?

 It is not recommended to plant or have roses in your horse pasture, mostly because of the thorns on the bushes. Horses will also damage the roses by eating the buds or flowers off the plants. To the best of my knowledge, roses are not toxic to horses. However, roses are not a good source of nutrition for horses, and the horses will likely damage the plants.