In 2007, Costco committed to selling 100% cage-free eggs, and it continues to do so as consumers become more concerned with how and where their groceries are sourced.

The retail giant is working to provide solutions to the changing demands by having the hens from their suppliers undergo a rigorous animal welfare assessment.

The cage-free title means that the hens experienced more humane husbandry practices. They are housed in indoor spaces where they're free to roam.

Costco assesses the welfare of its supplier's hens in five categories: nutrition, environment, health, behavior, and mental state.

Costco also requires its Kirkland Signature egg supplier to complete an audit using the Costco Hen House app platform. These audits are performed biannually.

The necessary audits and assessments have been helpful when developing a strategy to respond to the slight percentage decrease in the production of cage-free eggs.