I have 5 ISA Brown hens that are about 21 weeks old. About 2 weeks ago, I got my first eggs. I have been getting 3 nice brown eggs every day since, so I assume that only 3 of the hens are laying. Yesterday, along with my 3 regular eggs, I got 1 small brittle egg that had a flat spot on it. Then when I went out yesterday evening there were 2 eggs on the floor of the coop that were transparent and the consistency of rubber!. This morning, I found my 3 nice eggs, and another very small brittle, pale looking egg with the same flat spot. What gives? Is the small brittle egg safe to eat? Thanks for any advice.