The calories and recommended essential nutrients she receives is more important than quantity she eats. Calories intake depends on body weight/size, activity and ambient temperature. For example, if she weights around 15 kg she may need 850 kcals for 1-3 hour activity or just 680 if she is active for less than one hour. Just like human, dogs need a balanced diet which contains just the right amount of protein, fat, carbohydrates, many different vitamins and minerals to ensure that they stay in peak condition. Most reputed commercial pet food comes with a guarantee of nutritional adequacy and will have feeding guidelines on the label, based on breed size and activity. If you are feeding homemade food, you need to design recipe to meet his calories and make it balanced and complete. Please remember that it is not possible to feed your dog a consistent and adequate home-prepared diet without considerable time, effort, and expertise. Consult your vet for advice.
Question by - Aum Patel, Bangalore