First of all, it should be clear that to make cats lose weight, they need reasonable diet control and moderate exercise. Here are some suggestions to help your orange cat lose weight:

1. diet management: control the cat's food intake and diet quality. Give a proper amount of high-quality cat food according to the veterinarian's advice and feed it several times. Avoid overfeeding and frequent snacks.

2. Regular feeding: Set a fixed eating time and number of meals, and don't let the cat eat at will. This helps to establish regular eating habits.

3. Increase exercise: Encourage cats to do more exercise. Give rich toys, such as laser pens and chasing balls, to stimulate their vitality. You can also try to buy some climbing toys or set some high places for it to jump, so as to increase sports opportunities.

4. Cat companion: If possible, consider raising another cat as a companion. They can play together and increase opportunities for sports and activities.

5. Regular weight monitoring: Take the cat to the vet for weight monitoring regularly to ensure that its weight loss plan is effective.