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Sep 11, 2010 02:00 AM

Got a whole carton of double yolk eggs from Costco

One of those 18 packs, never seen a double yolk before, and the first 4 eggs I cracked from the carton have been double yolks so far. Pretty neat!

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  1. Same thing happened to me a couple of weeks ago. I think 15 or 16 of the 18 ended up being double yolk!

    2 Replies
    1. re: cheesymama

      me too, a couple weeks back

      I wonder if it's a side-effect of some drug they feed the chickens... or something... It certainly seems odd, since double yolk eggs are supposed to be 1 in a thousand, and these multiple double-yolk cartons seem to be a new thing.

      1. re: William Taft

        Young pullets, when they first begin laying eggs, will start off laying very small eggs and then often lay freakishly large ones - double yolkers are not uncommon. This will settle down as they get through their adolescent period and, as adult hens, they'll end up laying normal eggs. It has nothing to do with hormones or drugs that are fed to chickens - it's a natural phenomenon. At this time of year, pullets are just beginning to produce eggs - they were babies in the spring so these are their first efforts. Don't worry - just enjoy it while it lasts.

    2. This is not a new phenomenon. This happened to me about 30 years ago and I was making deviled eggs. Was very surprised after hard-boiling them and cutting them open to discover the whole lot were double-yokers.

      1. more than 1/3 of the Costco 18 pack of eggs were double yolks. Pretty cool until I started thinking about how many steroids they must give these chickens, kinda scary! time to switch brands.

        3 Replies
        1. re: yikesomg

          Maybe the chickens had 4 heads also.

          1. re: yikesomg

            Chickens in the US are not given hormones. Antibiotics? Probably. Hormones? No.

            1. re: yikesomg

              Or until you think about it and realize it would have been twins....

            2. I certainly don't know what causes it - but your experience is the same as mine. I can go years and years without every seeing a double yolk and then all of a sudden I'll get one carton that seems to have 1/2 of the eggs with double yolks - never just one egg, always multiple eggs. Very strange indeed.

              I have heard that young chickens are more prone to laying eggs with multiple yolks like mentioned above, still strange that so many end up in a single carton.

              1 Reply
              1. re: thimes

                Read the explanation above. It is not strange AT ALL.

              2. Five years after your post, I am finding the same thing in cartons of Costco eggs this week--every single egg has a double yolk.

                Sometimes the two yolks are totally separated in the shell, and sometimes they're fused together with one of the yolks instantly breaking when the egg is cracked open. I've never seen anything like this before. Seems creepy.

                3 Replies
                1. re: sbtoronto

                  This happens normally, nothing creepy about it. Did you READ the other posts before adding your observation/opinion?

                  1. re: greygarious

                    I didn't have a double yolk in years but got some jumbos and 1/4 were doubles. Two yolks were about the same size as a regular single yolk.

                    1. re: greygarious

                      It's happened to me. I know now it isn't all that abnormal … doesn't make it any less creepy when you go through a dozen eggs and they are all double yolks. I still eat the eggs and don't feel the need to conduct an exorcism but creepy.