An animal feeding structure can include one or more openings to drain water that is sprayed into the feeding structure in order to clean it. By draining the incident water, the remaining dirt, food and other particles are drained and removed from the feeding structure, thereby cleaning the structure without direct handling. Also, because the water is drained, water bounce back onto the person cleaning the bowl can be greatly reduced. The feeding structure can include an opening covered by a raised cap whose clearance from the bottom of the bowl can be adjusted. The feeding bowl can also include lateral and/or longitudinal slits of various sizes and shapes. The size and shape of openings can be designed to prevent food from falling out while allowing water, food crumbs, dirt, and debris to drain out. The effective size of the openings can be adjusted.