Which is the best dog food? As with people, dogs need a high quality, well-balanced diet in order to live a healthy and long life. What is important is to not just focus on what a dog needs to survive - as they say, 'dogs evolved to be survivors' - but look for what food a dog thrives on. And what a dog thrives on are the ingredients optimized to 'mimic his ancestral diet.' These 5+ dog foods are some of the best available and the ones we recommend for your dog in 2018.