If a cat suddenly loses weight, it may be due to parasites. If the cat is infected with internal parasites such as roundworms and tapeworms, these parasites will deprive the cat of nutrients, causing the cat to be unable to absorb enough nutrients even if it eats a lot. , thus becoming thinner and thinner. At the same time, cats may also have symptoms such as diarrhea and loose stools.

In addition, if the cat's diet is too simple, or if it eats low-quality cat food for a long time, the diet structure is unbalanced and lacks necessary nutrients. elements, may lead to malnutrition and thus make the body lose weight.