Gravity PVC feeder with dog bowl turned upside down as base. The pipe is cut and just sits on top of the hump of the center of the bowl. The PVC is notched to allow feed to seep out around holes and slide into the rim of the bowl. The shape of the inverted bowl works great to keep food in bowl, not all over the floor! Fills at top of pipe, then pipe continues through floor to another feeder under coop just like this one.