Teacup dogs are bred and bred from smaller dogs. After several generations of breeding, the offspring will retain the smaller size gene, and the dominant gene will lead to smaller dogs. Although teacup dogs are small, they have recessive genetic defects that often go unnoticed. The most common ones on the market are Teacup Teddy and Teacup Pomeranian. These two breeds do not have recessive genetic defects, but their lifespans are relatively short.

Methods for breeding teacup dogs:

1. Gene mutation. The teacup dog initially appeared purely by accident. It was a dog born due to a genetic mutation. Later, after years of improvement and development, the teacup dog's genes became relatively stable and gradually became what it is today. Moreover, the first teacup dog breed was the Poodle, and later breeds such as Chihuahua, Yorkshire Terrier, Shih Tzu, and Pomeranian were developed.

2. Take weight loss pills. Teacup dogs are actually equivalent to dwarfs among small dogs. Their size is usually no more than 20 centimeters and their weight is no more than 3.6 pounds. Due to their popularity, many businesses have begun to make small dogs such as VIPs and Chihuahuas look cuter and cuter by limiting their food intake and giving them diet pills.

3. Get microinjection. In order to cater to the mentality of consumers, businesses will breed teacup dogs through microinjection, inbreeding, and even caesarean section to deliver immature embryos. This has also resulted in many teacup dogs having low innate resistance, extremely short lifespans, and can only be fed. months or years.