Most of our are just mounted on a 4x4 set into concrete, with a piece of 2x4 across the top of the post so they can't push it up and off. One of my goals for this summer is to get on set up in every lot/pasture. This one is a mobile device, so it stays in a pen for the young stock or goats. The big boys just pick it up and send it over/into a fence.