[1010RD]

Thanks and I saw the correction. So if a bird or small mammal, fish, etc. ingests lead will it remain inert as it passes through the alimentary canal or is retained as with birds?

[E. Pluribus Unum]

The main problem with birds is the grit some species ingest to mechanically grind their food. It also grinds any lead they might ingest, breaking it down into smaller, more soluble pieces.

Fish don't have an actively grinding alimentary canal. It's just sort of a tube.