Grain-free dog food and grain-free dog treats are made with different ingredients. Grain-free dog food contains less protein and fiber than regular dog food, but it is high in nutrients and has a lower fat content. However, it can be more expensive than regular dog food, so you must be careful when choosing grain-free dog food. In the case of grain-free dog treats, they are made with natural ingredients like fruits and vegetables, which are better for your dog's health.