Layena has appropriate calcium content to support laying hens - it isn't about having "oyster shell" in the ingredients, but seeing a 4% (give or take) calcium content in the nutritional breakdown. What is "best" is relative - and a matter of what you want to do. There are several options - you can feed a layer ration and either provide oyster shell or not (layer ration is designed to be complete as is and *should* provide sufficient calcium, but it never hurts to provide the option to take in additional calcium if a hen's body tells her she needs it) - or you can feed a grower type ration and provide oyster shell to make up for the insufficiency of calcium in that ration. Option #1 is best for a flock of all laying birds, no males and no females that are under 18 weeks of age or not laying due to being too old, in molt or brooding. If you will have a mixed flock (gender, age, laying status) then option #2 is a simple way to provide what everyone needs without inadvertently causing health damage to those birds not actively shelling and expelling eggs at any given time due to an overdose of calcium.
