It is possible to feed your dog a vegetarian diet, but it is important to do so under the guidance of a veterinarian or a pet nutritionist to ensure that your dog's nutritional needs are met. Dogs are omnivores by nature, so they can technically survive on a well-balanced vegetarian diet. However, certain essential nutrients like protein, vitamins, and minerals may be harder to come by in a vegetarian diet, which is why professional guidance is crucial to prevent any nutritional deficiencies in your dog.