A feeder bowl for a bird or other animal in a cage includes a bowl having an open top and a closed bottom and has a notch extending outwardly therefrom between the open top and the closed bottom, a clamp ring extending around at least a portion of an exterior circumference of the bowl and positioned between the open top and the notch, and an attachment mechanism connected to the clamp ring for affixing the clamp ring to a cage. The bowl has an upper lip extending outwardly of the open top and having a greater circumference than the bowl below the upper lip. The notch is roll formed on the bowl so as to extend around a circumference of the bowl below the upper lip. The clamp ring has a curved flange affixed thereto. The curved flange is juxtaposed against an exterior surface of the bowl between the upper lip and the notch. The clamp ring includes a cross member having a curved flange affixed thereto. The curved flange of the cross member is juxtaposed against an exterior surface of the bowl on the opposite side of the bowl from the curved flange of the clamp ring. An expansion mechanism is connected to the clamp ring so as to vary a compressive force of the clamp ring upon the exterior surface of the bowl.
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