Today, a carton of a dozen eggs in Colorado costs around $4, up from a national average of $1.79 three years ago. Cage-free ...

Starting Tuesday, shoppers in Michigan will likely only find cage-free eggs on store shelves ... The law only applies to whole, shell eggs. It does not include liquid eggs or cooked eggs.

Grocery retailers such as Whole Foods and Safeway put purchase limits on eggs, citing supply chain disruptions. Cage-free eggs, which are mandatory under California's strict animal welfare laws ...