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twohedwlf t1_j1st9hh wrote

Yeah, many birds have grit in their crop.

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pokey1984 t1_j1t2mfz wrote

*all

All birds (that have a gizzard) have stones in it. The swallow them to break up their food before it passes into the stomach. It serves the purpose of teeth in other animals.

*birds without that organ, naturally, do not have stones in it.

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