Homemade dog food recipes and Nuvet vitamin supplements?

It's extremely difficult to prepare a well balanced home cooked diet. Nutrients that are in raw food are cooked out and may not be replaced with supplements as they are in commercial kibble or canned food. Most people don't provide enough variety to make sure all nutritional needs are met. This is important in elderly small dogs but it's of huge significance in a giant breed puppy like a Mastiff. Too many calories or the improper calcium:phosphorus ratio can cause irreparable bone and joint damage. It can be done, but I personally wouldn't attempt it without the guidance of an expert in canine nutrition. A joint support supplement with ingredients like glucosamine, chondroitin, and vitamin c is fine. Anything with calcium or bone meal is a major no no.