- Increased risk of genetic disorders
- Reduced fertility
- Increased risk of birth defects
- Decreased lifespan
In addition, inbreeding can also lead to behavioral problems, such as aggression and anxiety. For these reasons, it is important to avoid breeding dogs that are closely related.
If you are considering breeding mastiffs, it is important to find a reputable breeder who can provide you with information about the health and genetics of the dogs they are breeding. You should also avoid breeding dogs that are not registered with a recognized kennel club, as this can help to ensure that the dogs are healthy and well-bred.