Dogs can be inbred. Inbreeding will increase the probability of offspring carrying genetic diseases and deformities. Generally speaking, inbreeding is not recommended.

Disadvantages of inbreeding in dogs.

1. Increase the incidence of various genetic diseases.

2. The offspring will have low physical fitness and die easily.

3. It can easily lead to deformities in offspring, such as multiple eyes, multiple heads, multiple legs, etc.