
Pretty much everything, though u should stay away from onion type foods, except garlic, which is good for everything.
If you want to add something extra to the diet, just blend up lots of different green leafy veg (sprouts, cauliflower, cabbage, spinach) with some nicer tasting stuff like carrots, apple, avocado, celery etc.
My dogs favourites are apples, (in fact most fruits) celery, avocados, tomatoes, and carrots. Mine will scoff these whole, but they cannot derive much nutritional value from them, unless they are blended. I also feed nuts, like brazil nuts, pecans etc, as treats, adn blended in the food.
HTH, Em