Controlled natural breeding does not, therefore, add to the stray population or deprive strays of homes. Some people do prefer to go to a pet shop for their pet. Most pet shops don't interview prospective owners or make them sign neutering agreements. The market to which moggy breeders cater may be one of people who would not withstand a cat shelter's scrutiny. Unless, of course, they intend to supply cats.
Researchers usually wants animals with certain uniform characteristics.
This has mostly been answered already. Pedigree breeding is only one short step away from this. The vast majority of pedigree breeders take meticulous care to eliminate defects and to breed from genetically healthy, disease free animals. One is just as likely to have some serious health problems with a moggy as with a purebred. Firstly moggy breeding is not controlled i.e. studs and queens are rarely matched together in order to produce top-notch kittens.