Our hens are about 1 year old. I've learned each of their egg individualities but yesterday we found a very small speckled egg that does not meet my hens usual eggs. Can they (since they are still young) randomly lay an odd size and color? They have consistently over the last 3 months laid large sized eggs. This is odd one is so much smaller. Could something be getting into the coop? We do keep the small chicken door open all day, our chickens free range the whole yard so they are not in the coop or run all the time until night.