My parents have some chickens that started laying eggs about 3 weeks ago. All the eggs are very small, though. They're like half the size we expected them to be. I should also mention that out of 17 chickens, only 6 of them are laying. These chickens free range all day and have access to laying pellets, which they don't seem to eat much of. Any ideas what could be causing these tiny eggs? Here are pictures of the chickens. There are rhode island reds, leghorns, and I'm not 100% sure what the black ones are.