I ship extras because. I sell less then they lay. If i have 16 layers I sell a dozen eggs. If all 16 lay i included them but if they dont i still get the dozen ive promised. Ive shipped 20 or so orders and as far as i know every egg has gotten to its new place crack free. So for me I shipp extras because one I like getting extras and 2. the girls have layed more than expected.