The feeder is designed with the birds body size in mind. If the feeder appears to be "TOO" large for your parrot, it is because the only other feeding container available is a small open dish. Our feeder is obviously much larger than that. Also, when a bird is using our feeder, the majority of their upper body and head actually goes inside the feeder, and that is the way the food is contained. Think about it this way, from the main perch to the top of the hood has to be big enough for the bird to stand up straight on the main perch and not have his head touch the top of the hood. Besides, if we could make the feeder smaller to reduce the manufacturing costs we would, but that would not be best for the birds. So, the recommended feeder size is the feeder specifically designed for that bird and its situation.