You can make a slow feeder out of a variety of materials, and the design can range from simple to complex. Some of the best slow feeders are made from plastic barrels, plastic drums, produce bins, or water and feed tubs for livestock. If you choose to use a trash can or a plastic barrel you will need to cut an opening for the hay to be eaten from.
The opening needs to be covered with some kind of material that will allow the horse to pull the hay through but not get the teeth attached to it or cause any oral damage. You can also fill up hay nets and put them into old water tubs or feed bins, tie them inside, or tie them to the fence around the horse’s pen. The netting makes the horse pull the hay out and works well for slow feeding.
When making a slow horse feeder, it is vital to ensure there are no sharp edges that your horse can injure itself on. Make sure the net is secured firmly in place and cannot get caught on your horse’s hooves or halter.