what does protein do for dogs
The protein in dog foods can be supplied by animal sources, plant sources, or a combination of the two. Common animal-based protein sources used in pet food include chicken, lamb, fish meal, and beef. Common plant-based protein sources used in your pet's food include corn-gluten meal and soybean meal.eeding your dog a diet with primarily animal-based protein sources helps to do the following: 1  Maintain your dog's muscle mass. 2  Reverse some age-related changes in skeletal muscles in senior dogs. 3  Enhance the long-term health and well-being of adult and senior dogs.