Pigs like to eat and given the opportunity will spill their feed on the ground. This leads to the feed being wasted. To reduce how much is wasted, someone designed this feeder. We put feed in the top. The back lid keeps the feed from getting wet. When the pig wants to eat, it comes to the front, lifts the lid with its snout, reaches in and eat what it wants. This method keeps the feed contained, reduces feed wasted, and lets the pigs eat what they want. Creative tool!