- Breeding. Some dog fighters breed their own dogs specifically for the purpose of fighting. They select dogs that have the desired traits, such as aggression and strength, and breed them together to create a new generation of fighting dogs.
- Shelters and rescues. Many dog fighters get their dogs from shelters and rescues. These dogs are often already aggressive and have been abandoned or abused by their previous owners. Dog fighters take advantage of these dogs' vulnerabilities and train them to fight.
- Stealing. Some dog fighters even steal dogs from their owners. This is a cruel and heartless practice, but it is not uncommon. Dog fighters typically target small, defenseless dogs that are easy to grab.
It is important to note that not all dog fighters get their dogs from the same place. some fighters may only use one source, while others may use a combination of sources.