Here's why:
* Species differences: Ferrets are mustelids, while cats are felines. This means they are very distantly related and have evolved along separate paths.
* Chromosomal differences: Ferrets have 40 chromosomes, while cats have 38. This difference in genetic material makes fertilization and successful development of an embryo impossible.
* Physical incompatibility: Ferrets and cats have different reproductive organs that are not compatible for mating.
Attempting to interbreed ferrets and cats would be unethical and likely harmful to both animals.