A Biologically Appropriate diet for a dog is one consisting of raw whole foods similar to those eaten by the dogs wild ancestors. Doggies were meant to eat raw foods, Why? because dogs are carnivores. A dog need raw muscle meat, organs, fatty tissue, and bones. Just as mother nature intended. They have the digestive system, stomach acid, and bacteria killing agents for a reason: to handle these foods. Dogs are naturally designed to hunt and eat raw meat.
Read: https://en.wikipedia.org/wiki/Raw_feeding
godiz – I gave up the cans and the kibbles and began serving raw food to my dogs about 7 years ago when my oldest dog had developed gastrointestinal problems. It took me about 2 years running from one Vet to another, testing out all kinds of foods that they had recommended me, just trying to figure out the issue. With no successful changes at all. My dog had become so weak from vomiting 1-3 times a day I thought at that time I would lose him. I then decided to do my own re-search, and… RAW! was the answer. This is one of the reasons why my dog is now 18+ years. I’m so glad I made this change. It made such a huge difference and it literally turned my 4-legged friends life around. To each their own of course, but this definitely worked for us.