Cats put a lot of effort into giving birth. When they are weak and have no energy after giving birth, they will open their mouths and pant. At this time, the owner should replenish energy for the cat and feed it high-nutrition and easy-to-digest food. It is best to make the female cat comfortable. Get some sleep and it will return to normal 2-3 days after delivery. Pay attention to the supplement of calcium and vitamins to female cats after giving birth to avoid lack of nutrition in cats.