We have several horses on our farm, and I never thought about their manure as being compared to apples before. It is nothing out of the ordinary to see horse manure along our country roads.
I know that when we attend the 4th of July parade in town, many young children that have not been around horses before are quite curious when they see their manure.
I have used their manure as a fertilizer for my garden for many years. You have to be careful that you mix it in with other material, otherwise you will burn your plants if you apply this straight.