Kittens will spit out their teeth directly on the ground or swallow them into their stomachs when they change their teeth. However, kittens’ teeth are relatively small, so they are not easy to detect. As long as you observe carefully, you may be able to find the teeth that the kitten has changed. Kittens usually start to lose their teeth when they are 4 to 6 months old. Therefore, during the teeth changing period, kittens should be supplemented with nutrients and calcium, and they should be fed some food that is easier to chew.