Slowpokes do regrow their tails, much like geckos. So long as consent is given and the tails are ethically harvested, they're a perfectly acceptable meat source.

[Still, it's quite the fascinating concept. Eating tumors of all things. He taps below his beak, trying to envision this.]

Are the tumors safe to ingest, then? One typically wouldn't eat cancerous cells, but I suppose if it's a natural part of their life cycle, then there's no particular harm.