I believe mine started with an older hen laying soft/thin shells. And then the perpetrator figured out that she could crack all the eggs if she pecked hard enough. It's REALLY hard to stop one once they figure out how good eggs taste.
My problem did not start with a dietary issue but making sure they have what they need is definitely important. I use a 22% protein mini pellet feed so I was confident it wasn't that. But 16% feed was designed to be the ONLY thing they eat. It meets the minimum requirements without room to dilute with scratch and other treats.
I got frustrated enough to design and build some rollaway boxes. I put up pictures on this site from the build. The basic concept was to roll the eggs far enough that they are out of reach even if the hen figures out where the eggs are going. I saw others had built such things so I used their concepts and basic measurements but modified the design to better fit a hutch style coop as an external box. Zero eggs eaten since and they apparently love their boxes as there are no eggs laid anywhere else.
My problem did not start with a dietary issue but making sure they have what they need is definitely important. I use a 22% protein mini pellet feed so I was confident it wasn't that. But 16% feed was designed to be the ONLY thing they eat. It meets the minimum requirements without room to dilute with scratch and other treats.
I got frustrated enough to design and build some rollaway boxes. I put up pictures on this site from the build. The basic concept was to roll the eggs far enough that they are out of reach even if the hen figures out where the eggs are going. I saw others had built such things so I used their concepts and basic measurements but modified the design to better fit a hutch style coop as an external box. Zero eggs eaten since and they apparently love their boxes as there are no eggs laid anywhere else.
