Heard the rumor but never saw any evidence of more of a concern would be the hard outer(chiton)shell causing a blockage to reduce the risk of this feed only the white freshly shed worms as part of the diet-Anne
LOL I've heard that urban legend a thousand times. If you really think that mealworms can burrow out of stomachs then you better not eat fruit so trees don't grow in your stomach .
But seriously they're great nutrition. However the shells are undigestable...typically come out the other end hollow and in one piece....groooossssss.