What are two ways a farmer can prevent a hen from laying shell-less eggs?

Here are two ways the farmer could prevent shell-less eggs:

1. Provide a diet rich in calcium and Vitamin D3: Calcium is essential for eggshell formation, and Vitamin D3 helps in calcium absorption. Supplementing the feed with sources like limestone or oyster shells can be effective.
2. Control diseases: Certain diseases, such as infectious bronchitis, can damage the oviduct and lead to the production of shell-less or poor-quality eggs. Implementing proper vaccination and biosecurity measures can prevent such infections.