This morning I went to crack a store bought egg and the inter membrane was slightly tough to breakk through and egg white (albumen) was "white"... not clear or opaque as what I am used to.The yolk was unusually larger and more plump. The sell by date on the carton was dated jan 27th. well within the use by date. I have cracked a few eggs in my time and have never run accross this before! Does anyone know what this is???