How to make cats lose weight because your cat is not active, you do not need to eat as much. Gradually reduce the amount of food you feed 1/8 cup per week. (Inactive cats only have 1/4 cup of food twice a day). Feed her twice a day, preferably at intervals of 12 hours how to make cats lose weight, It is important to remember not to give table scraps during the weight loss program. Once you lose excess weight and if you start being more active (running and playing with toys) and increase your meal 1/8 cup. This is no longer necessary to maintain a healthy weight how to make cats lose weight.