It seems 3 out of our 5 leghorns are laying. We are almost out of grower and about to get layer feed from TSC, I think we'll get Purena layer feed. 4 out of the 5 have red combs and wattles, the youngest is starting to get wattles. Will the youngest be fine eating the layer feed? We'll mix it in the finisher. Also, we got two shell less eggs today. I crushed up store bought egg shells for calcium but I will feed them their own egg shells when we run out of store bought. Is oyster shell better or the same?