When changing pet foods it is important to add the new food in with your current food so that your pet can adjust. A good rule of thumb would be to start with adding 25% of the new food to 75% of current food, keep this mixture for several days, and gradually add in 50% and so on. Usually this process takes about one week. This is an important process as your pet needs time to adjust to the new food.
Overfeeding pets is a problem that all pet owners should be aware of. There are feeding guidelines that correlate with your pets weight and age.