As we touched on above, yes, it is totally normal for your dog to eat grass! Many veterinarians and scientists have seen grass-eating as a normal trait passed down to domesticated dogs from their wild ancestors. Our dogs’ ancestors hunted for their food, and they didn’t have the luxury of eating prepackaged kibble designed with their dietary needs in mind. Their digestive systems and nutritional needs evolved over hundreds of years to suit the lifestyle of domesticated dogs. This explains why, even if you’re feeding your dog a complete and balanced diet, eating grass may be related more to instinct than to dietary deficiency.