it may have to do with their diet (the birds, that is

). I had different looking whites every now and then, the occasional one having a greenish or blueish tint to it. Tell them not to keep them on top of the fridge, for haeavens' sake

. Cold and warmth obviously change the texture!
I do get either a dark red or greyish lump sometimes, none of my friends complained other than when it was obviously a large blood spot then replaced that egg for them