What is Eartha bait in hotdogs?

Chef's answer
Sodium erythorbate is the sodium of erythorbic acid, a highly refined food-grade chemical closely related to vitamin C, synthesized from sugar, and used as a color fixative in preparing cured meats. (Note: Erythorbate is NOT earthworms.
Frequently asked Questions 🎓
When asked about whether McDonalds use ground up earthworms to extend patties of their hamburgers, Ray Kroc, owner of McDonalds, responded, "We couldn't afford to grind worms into our meat. ... So it's added to hotdogs and hamburgers to keep the taste and appearance of meat fresh without changing the taste..
The extra "ingredients" that have shown up in hot dogs include worms, maggots, rodent parts, glass shards, a lock washer, and a Band-Aid.
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