Any cooking/diet scale should do. Do not get a spring loaded one.
Make sure that it measures in onces and/or grams. Most of the better scales will have a switch to do either onces or grams. Mine does both but, it is set on onces. Then I just go to an internet conversion site and convert the onces to grams.
i never thought to lookin the food section , i saw the postal scales but figured i could get something a little cheaper elsewhere, i just want to be able to keep track of lilys weight and make sure she's as healthy as can be.