This puppy food formula contains multiple protein sources including chicken meal, fresh chicken, and salmon. (pawster.com)
Generally, you'll only see this in products that are using multiple protein sources. (blog.nkdnutrition.com)
Consumers perceive meals containing multiple proteins to be healthier than meals containing a single source of protein, and would visit foodservice more often if this kind of dish were more widely available. (ciaprochef.com)