Most domestic cats are structurally finished somewhere around twelve to eighteen months. The Dragon Li is not. This breed is widely described as slow maturing, with muscle mass, chest depth, head width, and coat texture continuing to develop until roughly three years of age. An eighteen-month-old Dragon Li that looks lanky, narrow through the shoulders, and slightly out of proportion is usually not underfed or unwell. It is simply not finished.
This has practical consequences. Owners who judge the cat against a two-year-old British Shorthair often conclude something is wrong and start adding calories, which produces a fat adolescent rather than an earlier adult. Show breeders face the mirror problem, since a Dragon Li presented at a year old may be dismissed as insubstantial when it is merely young. The correct response in both cases is patience and body condition scoring by hand rather than by eye.
Behaviorally, the long runway means the boisterous teenage phase lasts longer here than in many breeds. The window from about six to eighteen months brings peak activity, peak testing of boundaries, and peak destructiveness in an under-stimulated household. It also brings the greatest capacity to learn. A Dragon Li that gets structured outlets during adolescence typically settles into a composed, self-possessed adult; one that does not tends to keep the adolescent habits permanently.
Sexual maturity, importantly, arrives far ahead of physical maturity. A Dragon Li female can cycle and conceive at five to six months, while she is still visibly a kitten and years away from finished growth. Never treat physical immaturity as contraception.