Well this is good to know because I have 5 outside bunnies at the moment with raised hutches. The chickens love scratchin' and picking at whatever they find good to eat. So far, no dead chickens, so I guess it's okay.
Cleaning: I've been soaking them in vinegar and water for several minutes before I wash them, is that over-doing it?
As for pickling, I'm here to learn also.