McDonald’s says it will switch to cage free eggs in the U.S. and Canada over the next ten years. The fast food giant is perhaps the largest buyer of eggs in the U.S. purchasing two billion eggs annually. Humane Society of the United States Vice President of farm and animal protection Paul Shapiro says the company is making the right decision by following sound science with this move to cage free.

Shapiro says research proves cage free hens are treated better than those confined in cages.

He says McDonald’s is following the lead of other egg buyers who have already made the decision to use eggs produced from cage free hens.

Other companies that have said they will switch to cage free eggs are Subway and Starbucks although neither of those chains has laid out a timeline for when they’ll transition to that.