Once you introduce a pedigreed cat into a traditional Munchkin they become a seperate breed. Munchkins ONLY have Munchkins and domestic cats in their pedigree.
I am one of the foundation breeders of Munchkin cats. I have been with this breed before they were recognized with TICA. I am currently serving my third elected term as Munchkin Breed Group Chair. https://tica.org/breeds/browse-all-breeds?view=article&id=793:munchkin-sh-lh-breed-committee&catid=73
Many of my cats have participated with the genetic studies done by Dr Leslie Lyons, which lead to the discovery of where the dwarf gene is located. All cats are guaranteed to be disease free.
There is much inaccurate information regarding Munchkins, this site hopes to educate and inform about dwarfism in felines, particularly Munchkins.