Weeeeeeelllll.... yes and no.
Gamecocks are disposed to fight anyway. It's their nature. Granted, nature didn't put steel spurs on them, Man did that. Still, they are fighters by nature.
Fighting dogs are usually pit bulls. I know a little something about this, because I knew a man whose past included dog fighting. A dog could turn away from the other dog and not fight... this happens sometimes.
Now granted, a lot of owners put down dogs that refuse to fight. Others just retire them when they lose their nerve. Lots of people think that is barbaric.
A lot of people don't know that many other kinds of dog trainers do much the same thing. I knew a breeder of bear-hunting-dogs... when one of the dogs they were raising showed fear of a bear, and refused to track bear scent, they took them back home and put them down. They didn't want the dog to spread his genes in their breeding stock, and had no use for him as a "useless mouth".
Animal shelters put down millions of dogs every year, for the crime of being unwanted.
Frankly, a big part of why many States outlaw cock and dog fighting has little or nothing to do with humanitarian concerns, but is rather about the politician's fury that gambling is going on and they are not getting their cut of the tax revenues.
I don't care for dog fighting or cock fighting myself... but I don't see why it should be a felony in most cases.
Especially cock fighting. They're chickens, for cryin' out loud. We eat hundreds of millions of chickens every year. We stuff them in tiny cages and take their eggs and kill them when they stop laying. Chickens are incredibly stupid creatures. They barely have enough brain to even stay alive without human oversight. No way would I make a man a felon over a freakin' chicken.