Is it true that a snail can damage the intestine

[optimus]

The truth is that a snail can damage the intestine,If you give a large shell Eggs?
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[Cashell]

I don't think they can even get such pieces into their digestive tracts to begin with, though I may be wrong. Some people do give their snails eggshells on this site, though I'd recommend cuttlebones or calcium blocks as better choices.