Proud to be American made - Loving Pets' It's Purely NaturalĀ® 100% Pure Dried Beef Lung Cat Treats are made from USA farmed and raised beef. Much higher in protein and lower in fat than most beef cuts, beef lung is a great treat choice. They contain no additives, fillers or artificial preservatives. What's more, they are wheat, gluten, soy, grain and glycerin free.