These guideline amounts are a starting point and your pet may need more food depending on age, activity and temperament. In order to reach optimal body condition, you may need to adjust food intake. This represents the total recommended volume of food per day. You should divide the total recommended feeding amount by the number of times you feed your pet per day to get the actual portion size per feeding. When introducing Iams Cat Food, gradually mix it with your cat's current food over the course of 4 days.