Found egg remnants in a nest-came in the house EXTREMELY angry. Emptied an egg, pain to do, filled it with mustard, took it out and put it in the nest box and immediately they all (10 hens!) raced over and ate it!! MUSTARD and all! I grabbed the egg shell when I realised that they like the mustard. GRRRR! Cannot believe it! They are just a year old and never has happened. Now what? I have round rocks in the nests to deter pecking and now mustard. Please, what can I do. They all have names from my kids so culling the whole flock is not an option. Thanks for any help.