What are the general opinions of when to switch layers from Chick Starter (18% protein) to regular layer feed? I am getting conflicting ideas. Also, my hens are 8 weeks old now and spend the daylight hours in a run made up with sand and dirt floor, when do you start putting out grit? what kind? granite. oyster shell? This is probably been asked 1000 times but I figure there are not many subjects that have not already been hashed out so why not ask again.