Your Chihuahua may like vegetables such as carrots, celery, and potatoes. Make sure to avoid onions and tomatoes. In addition, cooked vegetables are easier for dogs to digest.
Not all dogs like veggies but many do. Try Carrots, celery, lettuce tomatoes. Anything that you would cut off a vegetable and throw away you can feed to the dog. Do not feed onions, mushrooms, or grapes and raisins.