At only a few weeks of age, a kitten's bones have not yet hardened and become osseous. They are extremely soft and springy. In fact, if you take a week-old kitten and throw it to the floor, it will actually bounce! We do not recommend that you try this at home. The kitten may bounce under the furniture and be difficult to retrieve, as well as covered in unsightly household dust. However, the flexibility of the kitten's skeleton means that if the bones are gently warped at this early age, they can be molded into any desired shape. At Bonsai Kitten, we achieve this by placing the kitten into a rigid vessel soon after birth, and allowing the young cat to grow out its formative time entirely within this container. The kitten essentially grows into the shape of the vessel! Once the cat is fully developed, it is removed (or the vessel broken to remove it!), producing the lovable, furry pet you've always wanted, but it remains in the shape you've always dreamed of! There is virtually no limit to the eventual shape of your pet!