Birds can be a pest around the horse property as they search for sustenance, fouling water and feed-bins and spreading weed seeds in their droppings. The presence of grain in horse feeds encourages larger numbers of birds, which can take a toll on trees and newly sown crops.
However, evidence gathered from the Integrated Pest Management for the Horse Farm report (2007), demonstrated that birds may also affect the incidence of intestinal parasites on the horse farm in ways that are both positive and negative.