And jaguars too! They showed up in one book and never re-occurred because she already had her leopards and thus didn't need another spotty sort, I guess. My personal theory is there are more feline types because MOAD, the progenitor, was a werecat herself so the theriantrhopy adapts better to big cats, but out-of-universe I think LKH just favors big cats, especially pretty tigers in special colors.