Hello, I have been feeding my flock Gran-i-grit and I just noticed that the bag says "starter" -- I didn't realize it came in different sizes! My flock is now 6 months old and according to the Gran-i-grit website, they should be on "layer" size. My local Agway only carries starter and grower - they say they can't get layer; it is not available from their supplier. I am going to poke around the internet to see if I can order it (shipping costs = yikes!), but the two I have visited so far say "not available". So I am wondering if this manufacturer is still making the layer size? Second question - does it matter much if I use grower vs. layer size? I would rather not have to pay the shipping charges if I don't need to. So far they seem perfectly healthy on the starter grit (they also get calcium chips which are larger), but I think I need to increase the size. I appreciate any suggestions on this ... this is my first flock and I want to keep them healthy. Especially since they are already laying quite well! A related question - the calcium chips seem "gritty" but I believe they need the gran-i-grit because it is harder and acts as a better grit in their crops? The calcium chips will break down? Do I understand this correctly? Thanks for your help!