I think I am getting conflicting stories... The guys at the feed store said that if I'm feeding the layer pellets I don't need to feed them anything else. Then they said that if I feed oyster shell that oyster shell *IS* grit for them so I don't need grit. And I read somewhere that oyster shell is not grit at all. I'm sure the guys at the feed store just consider me the silly american woman that likes to spend too much money on her chickens, as in their country, chickens are chickens and they aren't coddled like pets, but anyway... can anyone clear up the dilema for me? THANKS !