This invention generally relates to animal feeders, an animal feeding monitor and a method of training an animal to use a feeder. An animal feeder may have a housing comprising an aperture for a food bowl and having a door for covering the aperture, the feeder comprising a door mechanism to control movement of the door over the aperture, wherein the feeder comprises a sensor to detect when an animal has moved away from the aperture, and the feeder is configured to be operable in a training mode wherein the door mechanism is operable to control the door to cover a portion of the aperture in response to a said detection and to respond to one or more later said detections by controlling the door to cover a portion of the aperture larger than the preceding said portion.