The dangers of obesity to cats:
1. Obesity increases the load on joints, significantly increasing the likelihood of cats developing bone and joint diseases, and in severe cases, even causing paralysis. Excess weight increases pressure on joints. Older cats may develop osteoarthritis. Overweight cats are five times more likely to limp than normal-weight cats.
2. Increased burden on the heart and respiratory system. Excessive weight increases the likelihood of developing high blood pressure and puts a greater strain on the heart. Since the heart pumps blood throughout the body, being overweight increases the area the heart needs to pump, placing excessive strain on the cat's heart and negatively impacting its health.
3. Fatty liver. When the body is in a fasting state for a short period, it will lack energy. In this situation, the liver will absorb energy from the body's fat, playing a crucial role. However, if a person is overweight, unnecessary excess fat will accumulate in liver cells, affecting the normal function of the liver.
4. Obese cats are more prone to calcium deficiency, which may lead to symptoms such as fear of heights, sluggish movements, and lethargy. 
Methods for helping cats lose weight:
1. Cats have delicate digestive systems, so it's best to feed them small amounts of cat food frequently. It's not recommended to give them large amounts of cat food at once. Use low-calorie, low-fat, high-protein cat food.
2. Obese cats generally don't like to move around, so pet owners should find ways to encourage their cats to move. Depending on the cat's preferences, you can add some cat-specific play equipment at home, such as cat trees and scratching posts. Owners should also spend more time playing and exercising with their cats.