I don't know what the current anti dog fighting laws are, so I don't know *exactly* what is illegal.
Fact: dogs fight for a variety of reasons. It's a normal, natural part of their behavior. Many dog fights are pretty intense, and sometimes dogs -and their owners- are injured or even killed.
If dogs are afforded legal rights, and dog fights are illegal, who has committed a crime when two dogs have a dispute? The dogs, or the owners? If animals have legal rights, they must also have legal responsibilities, so since dogs fight as a normal, natural part of their behavior, how do we enforce laws against dogs fighting?
If dogs are afforded moral rights, and most people agree dogs should not fight because it's against our human morals, is that a good justification for making it illegal? If so what part(s) of it? Or under what conditions?
If dog fights are illegal, is every dog fight a criminal act? Can Grandma be arrested if her Chihuahua is involved in a toothy tussle with the Chihuahua next door? It depends. Or are the laws only concerned with big, loud, muscled dogs that might send each other -or smaller dogs, or the owners- to the hospital?
Can we call a dog fight a form of animal cruelty when it is a natural, normal part of a dogs life?
For the record: I think encouraging dogs to fight is repugnant. It is against my ethics, and I have no problem if doing so is also illegal.