Nothing worse than a fighter in your kennel's always on edge and upsets the balance,everybody always say's give it load's of work i think its part true that and part myth if a dogs a fighter its a fighter and i would say its 50/50 on the owner to blame some are just plain idiots and were born idiots some are ruined by people how they rear them lack of socialisation etc as a pup and if a dog is a fighter its a fighter ive yet to see 1 broken with load's of work if it's just an out and out fighter if anything i just think it tip's them over even more at 18 mths it will be a tough job to correct