My laying flock is down to three so I am going to add three new chicks. I will switch the layers back to a grower feed (all flock) and offer oyster shell free choice for calcium (I do this any way). Will the chicks just not eat the oyster until they are ready to lay? It seems to me that they would eat it as if it were grit. I know a lot of people do this and am sure it works just fine. I just like to know the hows and whys.