https://todaysveterinarypractice.com...thies-in-dogs/
Quote from the above link:
While there is no inherent benefit to feeding a home-prepared diet in most cases, some people may prefer to feed such a diet. Most recipes found online or in books do not provide complete and balanced nutrition;15 thus, a board-certified veterinary nutritionist should be consulted if an owner wants to feed a home-prepared diet (Table 5). The importance of consulting with a veterinary nutritionist cannot be overemphasized.