Author name: Alex Carter

Breweries churn out billions of pounds of spent grain every year—nutrient-dense, fiber-rich barley or other cereals left over after mashing. Until recently, most of it became landfill, compost, or low-value cattle feed. Today, zero-waste-minded pet brands are transforming this “brewer’s gold” into crunchy, hypoallergenic dog cookies that smell like weekend brunch and tread lightly on