The reason you gave for a dog to fight his chain is just one reason. Ive found some dogs are just destructive to everything they can touch, call it the stress of confinement or whatever. Outlets detour nothing for some. When they didnt have a chain they chewed a pen.

From what i have seen here, these few chain fighters that cant be detoured are more often than not unexceptional or some flat out dont start. So what may have been true with your dogs is not the case with these. Some call these dogs chain curs or chain bad asses. They act real willing until the hammer drops.

If it was the case that my more exceptional dogs were chain fighters on a consistent basis id have to breed far far away from that, which means culling. Why would someone stack the odds against their future dogs by incorporating that into a breeding program?