We have a chicken who has been laying eggs with no shells. They look like an egg and feel rubbery, but there is no shell on the outside. Any ideas as to what could be wrong? Also, we had 2 Rhode Island Reds, (Cinnamin and Sugar), 1 Plymouth Rock, (Speckles) and 1 guinea hen. We lost Cinnamin the other day to a neighbor's dog and I was pretty upset. Anyway, when we had the 3 chickens since Spring of this year, we would get only 2 eggs every day, never three! Someone who has chickens told us that the third chicken would take the place of a rooster and never lay eggs. Any truth to this?