Was gifted two feeders for our cats (pictured below); however, they have different bowls. The feeder with the bigger (better-fitting) bowl and riser works wonderfully. The other with the smaller (ill-fitting) bowl and no riser allows for bits of food to escape the bowl (getting stuck in the spaces where the feeder and bowl loosely fit) and allows for the next portion of food to be dispensed with a little encouragement from my cats. I've pushed the smaller bowl as far into the feeder as possible and know it's attached correctly. The feeder with the ill-fitting bowl has become my cats' favorite and my least. Wish I could replace the smaller bowl with another bigger bowl/riser set up; however, while the bigger bowl/riser are advertised in the product pictures to the left, the only bowl offered as a replacement part is the less functioning one