So out of my 5 hens that eat layer pellets, 2 are layingsoft shelled eggs AND eating them! I have oyster shell on the side & give back crushed eggshells when I have some. 1 of the culprits is a battery hen that is 2yrs old. The other is one we hatched out last June. What can I do? could this be due to the fact that we've had a lot of rain, nearly every day for the last week and a half? they go inside the coop to lay and to sleep, otherwise they are in a run & it has been nasty & wet