The invention relates to a device for automatically supplying feed and/or drink to an animal, comprising at any rate at least one trough, a flap, a control unit for controlling the flap, so that the flap is capable of being put in an open position and in a closed position for giving the animal access to the trough, respectively preventing the animal from having access to the trough, and an identification device for identifying the animal and for emitting an identification signal that is indicative of the identified animal. The control unit is provided with a memory, which memory is suitable for storing a first set of identification data in relation to animals that are allowed to have access to the trough and a second set of identification data in relation to animals that are not allowed to have access to the trough, with a comparing device for comparing the identification signal with the first and the second set of identification data in the memory, the control unit always keeping the flap in the open position or releasing the flap from the closed position if the identification signal belongs to the first set, and the control unit keeping the flap in the closed position or releasing the flap from the open position for enabling it to assume the closed position if the identification signal belongs to the second set.