Why are there both longhaired and shorthaired LaPerms? Why are they not different breeds?
Most breeds are developed and then established in one hair length and if another hair length is developed later down the line it is seen as a new departure and given a new breed name. Some breeds, such as American Curls, Japanese Bobtails, Selkirks, including the LaPerm, originated and were developed in both hair lengths so there was no need to divide them into two breeds and kittens of both hair lengths can happily occur in the same litter.