The real reason all of your eggs still aren’t cage-free

Almost half of America’s eggs now come from cage-free farms. Animal advocates say it would be closer to 100 percent if it weren’t for the grocery sector, which has been slow to transition to a cage-free egg supply. | Mike Campbell/NurPhoto via Getty Images

Nearly half of the eggs sold in the US today come from cage-free farms. That’s an astounding turn, considering that in the early 2000s, just a few percent did. 

But according to pledges made by many of the country’s largest food companies ...