The reasons why cats do not gain weight no matter how much they eat:
1. When a cat’s intestines and stomach are fragile and its digestive function is not good, it will not gain weight. It is necessary to feed the cat some probiotics. To regulate the cat's intestines and stomach and promote digestion.
2. If the food fed to the cat is relatively simple, the cat will lack nutrition and will not gain weight. The diet structure should be adjusted to ensure a diversified food to achieve balanced nutrition.
3. If there are parasites in the cat's body, it will absorb the cat's nutrients, so the cat will not gain weight. The cat must be fed internal deworming medicine in time.
4. Some cats, such as short-haired cats, Siamese cats, Bengal leopard cats and other breeds, are born thin due to genetic problems. Even if they eat a lot, they will not gain weight easily.
5. Cats are in the developmental stage, have a lot of activity, and have a strong metabolism, and they will not gain weight. The owner can feed it some high-protein or calcium-containing food, which is conducive to growth and development.