Hi,,, we are new to raising chickens,, our girls were born in April,, and should be about to start laying soon. We bought our next bag of food, and got layer to mix with their grower that they are on right now. I also bought a bag of calcium chips ,, and am not sure how to mix that in ,, or if i put it in some other dish on its own, seperate from their food. Which is better > Oyster shells or Calcium chips ? The woman at the local feed store told me they both do the same thing ,, and since the calcium was so much cheaper , i opted for that . ANy would help is appreciated ! thanks !