Any kitchen scale that measures grams will do actually! :) I bought mine from Bed Bath and Beyond and my birds will step down onto the surface of the scale. Or, you can get this scale:
My Weigh iBalance 2500 (i2500) - Digital Kitchen Scale / Food Scale - i2500-BLK. I like it since it does double duty as a kitchen scale or a bird scale if you get the optional bird perch.
