The following principles should be followed when feeding a cat to help it lose weight:
1. Calculate the amount of food according to the cat's daily resting calorie requirements to avoid overfeeding.
2. Choose low-fat, low-calorie, high-fiber cat food, such as Orijen Household Cat Food or Ross Cat Food.
3. Choose high-protein cat food to help your cat feel full.

4. Divide the daily food intake into multiple feedings to prevent the cat from overeating after prolonged hunger.
During the weight loss process, the cat's weight should be monitored regularly, and the feeding plan should be adjusted as needed.