The pet feeder includes a casing having an opening, a tray unit housed in the casing having a number of trays, a refrigerating unit inside the casing enclosing the tray unit so that all trays except one tray exposed by the opening are covered, a temperature control unit housed in the casing and connected to the refrigerating unit and the one tray exposed by the opening, and a driving unit connected to the temperature control unit and driving the tray unit to spin. Through the refrigerating unit and the temperature control unit, the trays are refrigerated whereas the one tray exposed is heated so that the pet may enjoy a warm meal. The driving unit automatically turns the tray unit so that one tray is exposed to feed the pet at scheduled times. The feeds remain fresh and the amount of feeds for each meal is also appropriately controlled.
