Being the owner of 16 Boerboel dogs (BIG) running loose on my property i can comment on dog fighting... :(
I absolutely despise my dogs fighting. I am not the Alpha, but [size=6][color=red]THE ALPHA[/color][/size]!!!! If they even try to have an attitude, they will get it, smack bottom that is.
I had a smallish female who was big trouble - any dog or human other than our family was targeted, and boy, where she bit she locked - you might as well welded her jaws together!! Kicking, hitting, pepper spray, pepper (all i did was destroying my own sinuses), wheelbarrow method with two adult males.....nothing :( I fought so hard with her that my chest usually was burning from exhaustion!!
All that worked was a water hose up her throaght for at least 15 seconds!!!!!!!!!And then she was calm as hell :-?
Big dogs fighting is always big trouble, so i had to make plan to break up a fight in seconds, no matter how tough the dog is. A friend told me this, so dont laugh - you embrace the culprit and bite his ear - HARD. It works if it is a good natured dog, but what if the male dogs weigh the same as you and is as strong as a flipping steer? You get yourself a shock apparatus - the ones they use for self defence and voila - you have super control over all your dogs!!