An animal feeding device is provided including at least one cassette including a frame including wall elements defining upper and lower compartments, side wall elements defining a width of the upper compartment, a food container housed in the upper compartment, supported by at least one wall element, and a food delivery device housed in the lower compartment. The food container communicates with the food delivery device through an opening provided in a bottom portion of the food container. The food container has front, end, and side walls. The side walls are parallel in a longitudinal direction, have a constant distance therebetween in the longitudinal direction, are opposite to each other, are connected to and separated by the front wall in one end, and are connected to and separated by the end wall in an opposite end. The end wall has an inclination towards the bottom portion of the food container.
