The best advice I can give you is to get a good book like Dr. Pitcairn's book. It will explain their dietary needs and needs for certain supplements like calcium so that you can cook for them on a long-term basis

My babies get 3-4 small meals per day. In the early mornings, they share a juiced celery stalk or juiced zucchini for breakfast. Then a couple of hours later, they get whatever I have cooked up for them for the two weeks. For my maltese, right now she's eating lean ground beef, oats, and green beans with supplements like bone meal, vitamin e, nutritional yeast, etc. My liver compromised yorkie right now is getting eggs, potatoes, sweet potatoes, green beans and carrots with supplements added. Then a few hours later they get a snack like apples cut up and peeled or watermelon or a snack like that. A couple of hours later, their meal again. Then for dinner, they get their meal again.