Yes please research this! Any female under 5 pounds is extremely risky to breed, too dangerous. Teacup is a term coined to sound rare and to draw money!! The standard is 4 to 7 pounds. I am in no way trying to be rude and you probably unaware of the complications of doing what you are thinking of doing which is even more reason to research so that maybe one day you can have a healthy mom, dad and litter of squirming babies!!