Just cracked an egg and the white was all bloody - the white was still translucent but completely mixed with blood. Not just spots. The yolk was soft and yellow. Just googled it and as far as I can tell it happens if the hen bursts a capillary while the egg is forming prior to the shell being created. It was a free range egg from sainsbury's. Shouldn't their screening process have picked this up?
Very yucky :-(