When a cat is skinny and skinny, it must be supplemented with nutrients in time. If the cat is less than 3 months old, then just feed goat milk or milk cake, millet porridge and other liquid foods. Cats after 3 months old can , you can feed cat food as the main food, then mix it with some meat and vegetables, boil and chop it into homemade cat food, and feed it. If necessary, you can also feed cat nutrition paste. If the cat is severely malnourished and can no longer walk or stand, it will need to go to the pet hospital in time to inject it with a certain amount of nutrient solution for relief. Another thing to note is that if the cat does not gain weight no matter how much you feed it, then it is likely that parasites are at work, so the owner must do a good job of deworming the cat regularly.