A dog breeder decides that he wants to make his chihuahuas smaller He calls another and borrows their smallest female chihuahua breed with male This is an example o?

Here's why:

* Selective breeding is the process of intentionally choosing individuals with specific traits to reproduce. In this case, the breeder is specifically choosing the smallest female chihuahua to breed with his male chihuahuas, hoping to produce smaller offspring.

It's important to note that:

* Ethical concerns: While selective breeding can be used to enhance desirable traits, it can also lead to health problems in future generations. Breeders need to be careful not to prioritize extreme traits over the overall health and well-being of their animals.

* Genetic diversity: Breeding only with the smallest individuals can decrease genetic diversity within the breed, making it more susceptible to diseases and genetic disorders.