I read that once hens get a taste of their eggs, they always eat them. I haven't found this. When the shells are cracked, they eat them (and they do this enthusiastically) but if the shells are intact, I don't see this. Am I missing something? Frankly, if a shell is cracked and they haven't eaten the egg, I smash it in their dish and walk away. I don't want that egg anyway. What do you do?