Made with milk from cows not treated with rBST (No significant difference has been shown between milk derived from rBST treated and non-rBST treated cows). Challenge: Real challenge. Real difference. First quality. Churned with daily from pasteurized sweet cream. Grade AA butter. www.challengedairy.com. Questions? Call toll-free 1-877-883-2479 or visit www.challengedairy.com. Try delicious Challenge Spreadables. The wholesome quality of Challenge Butter: Smooth, silky and ready to spread.