i saw someone once who cut the slugs in half before giving them to her chickens, apparently exposing their insides was enough to show the hens that slugs were food (in her case).
having access to the outside world in general is a risk of exposure to parasites... it's not something you're ever going to control, unless you keep your chickens totally inside forever (and even then, sometimes they get in). bugs are great free food for chickens. if you're really worried about parasites, you can research deworming and treat if needed.
having access to the outside world in general is a risk of exposure to parasites... it's not something you're ever going to control, unless you keep your chickens totally inside forever (and even then, sometimes they get in). bugs are great free food for chickens. if you're really worried about parasites, you can research deworming and treat if needed.