The appearance of long legs in Munchkin cats should be caused by the long-legged gene and the combination with long-legged cats during mating. However, generally speaking, if a Munchkin cat mates with a short-legged Munchkin cat of the same species, it is difficult to produce a long-legged Munchkin cat. If a Munchkin cat mates with a long-legged cat, the resulting litter will have 1-2 long-legged cats.