[Nails]

Hi,

Does anyone know why one of my chickens is laying an egg coated in a layer of white chalky stuff that comes of when you rub it gently?  I think it is an egg being layed by a rhode island red about 18 months old, and the others are not doing the same?

[jobson336]

ive got a hen that does that, i dont know which one but id be interested to know why. 

[CluckyChicken]

could it be a calcium deposit- but in a different way?  I've had this a couple of times with my Maran, but there is nothing wrong with her