This is not legal in most places but theres talks of other animals fighting so why not ask.
I know it is popular with Bitcoin and gamblings.
Ive seen cockfighting,ants fights which i do see considerable thing rather than betting on a dog fight.This isnt a livestock but rather a mans bestfriend
which isnt suit out for them to fight to the death.I do see some videos of these dog fights which i cant dare to see it for long.So its a big NO for me
when you do ask me when it comes on betting on it.