Thanks, yes, am aware of the potential for parasite infections, but I'm not sure there's anything I can do about preventing it if I let them peck at the ground, except keep their forage area moving. Unless I keep them in a sterile environment, and even that would be hard to maintain, there is no way they aren't going to encounter a slug. We are on a hillside where there are spring seeps here and there, forest and field on all sides....bugs of all kinds abound.
That reminds me that two days ago while sitting with them someone I don't remember who started running in circles, I realized she was after a fly that was buzzing her, I could see it - either a small deerfly or housefly, it was fast - it took off in a straight line and she chased it, then it doubled back and she ran in a circle again and then bit the air. Fly taken care of.