if they are babies, then yes, i would be worried about leaving crickets in the cage. they can cause damage and infections from biting and even walking on baby red eyes, this can stress them out terribly.

i would cup feed them. take a small plastic cup, rub some vaseline around the top inside, and put in either some 1/8" crickets or some flightless fruit flies. this will help keep them in one area, and not all over you tank. and you can easily take them out when you're done.

hope this helps.
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