If a female cat loses her kittens, she will usually search for 5 days. The more maternal the cat, the longer the search time will be. During this period, the female cat may be more excited and irritable, often looking around, but after a few days Still can't find it, so I won't look for it again. Generally speaking, kittens must leave the mother cat 40 days after birth. At this time, the weaning has been completed. Normally, the mother cat will not have much reaction and will basically forget the kitten after 1-2 days. ,Normal life.