Breeding cats is really not all that easy in a home situation. Sometimes people think that they could start off with a female kitten and then find a male to breed her to when she is grown. This rarely works, because there is seldom a cattery close enough and willing to take outside cats in for breeding.  It ends up being very difficult to find a healthy whole male old enough to father the kittens.  Since you don't just let a female Munchkin roam the streets, you need to have a male that is indoors and well cared for but not fixed. Very few people keep such a male, as it would usually spray all over their home.  The situation with this is further compounded by the fact that an unspayed female will become frustrated and will also spray urine around your house. A female Munchkin tends to start going into heat as early as 6 months, but it is not advisable to breed them until they are at least a year of age - this allows for a long time of frustration for the cat, who will go into heat every three weeks when the lighting is right, and most unspayed and not pregnant female cats will eventually begin to spray urine on the furniture.  They can't help it.

If you decide to start off with both a male and female so that you won't have the problem of trying to locate a male for your girl, you will then have two cats that will be eventually spraying urine on your furniture, and male cat urine ultimately gets a much stronger odor, which permeates a home even if the cat is putting it in a litter pan (incidentally, it takes several months after neutering for the strong odor of male cat urine to subside).  One female cat being bred once or twice a year will not keep your boy from spraying - as a matter of fact, I don't think that any number of available females would keep a male cat from spraying his territory once he gets old enough to feel the need to mark it.

Although breeding cats underfoot in the home is naturally what everyone would like to do, there are many reasons why it is not feasible nor the most healthy way to raise kittens.  We recommend a book by Dr. Neils C. Pedersen of the School of Veterinary Medicine, University of California - Davis - Feline Husbandry, Diseases and Management in the Multiple-Cat Environment - as a genuine help and guide to the best way to house breeding cats.  It is now out of print, but there are used copies available at Amazon.com - although a bit pricey.  Because the author is genuinely interested in being helpful, however, it is available in pdf format at http://www.vetmed.ucdavis.edu/CCAH/feline_husbandry.htm - the initial item of interest to someone considering breeding should be Chapter 8 - the first 2 pages.

Perhaps you are already a cat breeder and are very familiar with the above, but there is another problem with breeding Munchkins that you might not have had with other breeds.  A certain percentage of your kittens will be longlegged kittens, and you will be faced with finding them responsible homes and receiving little or no money for their care, raising, and vaccinating - if you are in fact able to find them homes.  You can in fact have an entire litter of kittens from 2 Munchkin parents that are all longlegged.  In most litters, you will have no more than 1/2 of your kittens sell-able.  This is not a situation you run into with many other cat breeds - you might have differences in quality, but they are all obviously of the breed.  In some parts of the country, finding good homes for "ordinary" kittens is relatively easy - but in other parts, it is next to impossible, so this needs to be examined.

These are just some thoughts on breeding Munchkins, as sometimes people think they would really like to do this and then are disappointed because expectations were not in-line with reality.  We have had several new breeders who bought their breeding Munchkins elsewhere approach us within a year of getting the Munchkins wanting to sell them again, and we would like to help keep this from happening.  Having Munchkin kittens and cats has been delightful for us, but there were periods of time when things were very difficult and unrewarding, while we learned what we needed to learn in order to persist.