If you arrange a little pile of dirt on one side of each hole, maybe they'll think it's gophers. There are never enough holes in the ground. Strive daily to do your part to help correct this problem. This lets the ground know who's boss and impresses your human. Always take a BIG drink from your water trough immediately before nuzzling your human.
Humans prefer clean muzzles.
Be ready to rub your head on the area of your human that you just nuzzled to dry it off, too. If you lose your footing while frolicking in the paddock, use one of the other horses to absorb your fall so you don't injure yourself. Quickly determine which guest is afraid of horses. Rock back and forth on the cross-ties, neighing loudly and pawing playfully at this person. If the human backs away and starts crying, swoosh your tail, stamp your feet and nicker gently to show your concern.