Is grain free better for dogs?
However, some of the carbs used in grain-free pet foods are better options for your dog's food, because they're generally healthier than corn or wheat.
grain- or gluten-free wet dog food can be higher in protein and contain fewer carbohydrates, so that may be a better (but more expensive) option.
Many believe it's instinctual behavior, harkening back to the days when your dog's wild ancestors would mask their scent to help them sneak up on their prey.
Wolves, for example, have been observed rolling in animal carcasses or the droppings of plant-eating animals, to cover up their own smell during the hunt.