Ducks are awesome with slugs they have really saved by Hosta beds BUT the pekin also like to lay in this bed.. yeah, they are chubby and this fails epically.
Oh gosh, not a thing it's more like how to keep them from squashing my gardens lol
Amiga sounds like she has good advice for this.. mine almost all free range so they can go find all sorts of stuff.. mainly they like grass, bugs.. and other various icky things.. like frogs, mice etc..