How much is too much? I put in around 2 dozen crickets the day before yesterday and they ate all they could find, and still seemed hungry for more. The crickets do tend to find hiding places around rocks, the filter, under the moss -- hard to get out so I left a couple of crickets in there being pretty sure once the frogs saw them they would try to catch them and eat them. Tonight I put in about 2 dozen again, and they are eagerly eating them, and still being aggressive about it.

If they are overeating, how do I tell when they are too fat (so to feed a bit less)? They have plump bellies from the other day's feeding.

Edit: A picture of the two green ones after tonight's feeding (can't tell too well but they have roundish bellies):
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