Currently I'm feeding my chickens Nutrena Natures Own Layer Crumbles. After doing some research online I've seen some people complain about thin egg shells. I have one girl that is laying out of my 3. She's only laid 2 eggs but they were both rubber eggs. Out of curiosity, are all layer feeds the same or do you find there is a difference in the quality, production and egg shell with different feeds. I'm eliminating table scraps until the shell issue is fixed. Thinking maybe they aren't getting enough calcium. I did just put out oyster shell for them as well.