The phrase "breed formula" refers to a method or plan that is used to create or develop a specific type or kind of something, such as a breed of animals or a product.
I learned that they offer a small breed formula Smaller kibble & specially formulated to help support the needs of dogs under 25 pounds. (fidoseofreality.com)
This small breed formula provides complete nutrition in a small and nutrient - dense kibble. (geekwrapped.com)
Large / giant breed formulas typically have fewer calories than other dog foods to help big dogs stay slim. (pawster.com)