Grain-free dog food is a type of pet food that does not include traditional grains like wheat, corn, or rice. Instead, it often uses alternative sources of carbohydrates, such as sweet potatoes, peas, or lentils. This diet is designed for dogs that may have sensitivities or allergies to grains, providing them with a different nutritional profile. Many pet owners choose grain-free options believing they are more natural or healthier for their dogs. However, it's important to consult with a veterinarian before making dietary changes, as some dogs may require grains for balanced nutrition.