I agree about the quantity being overestimated, Fleecewife, I'm sure you're right.
Robert, the guy wasn't bothered, so it's not about the price or anything, he just wanted to let me know in case there was something wrong with the layer. I don't like not having an answer (for anything!) ready, so that's good to know about the reason for the blood. Glad it was him, though, and not a customer.
I'm a lazy cow and I can't be bothered candling all the eggs, the cream legbar shells are quite thick and it's hard to see much.
Thanks, chaps!