chicks eating oyster shells

[Dhkoenig]

Hey all - I switched over from chick/layer feed to all flock (flock raiser) for my flock that has 7 week old chicks mixed with adults. I put out oyster shells for my grown up hens and the chicks love it! They want to chow down on it! I think it is deadly for them to have too much calcium and I can't put it high up because I have a few small adults who wont be able to reach it. The flocks have been mixed for several weeks. What should I do?

 

[nuthatched]

It won't hurt them but I'd remove it for a few days.