My friend has an old english game hen, I don't know if it's bantam or standard. She is a year old and she lays very small eggs about the size of a filbert nut and they never have any yolks in them. Any one know what would cause this or ever heard of such a thing. I have been raising chickens for 16 years and have not ever experienced this with my chickens. I posted this also on the Old English Game bird forum also.