Well, by prohibiting it, that immediately gives police the power to stop it in a way they don't have now. They could do it with cockfighting, but they couldn't do it with other kinds of animal fighting.
There was a study in Ontario in 2016, “Dogfighting: A Problem in Ontario?”, which began to draw the links between organized crime. It's usually gambling and then other associated activities, including drug trafficking and that sort of thing, which kind of happens alongside.
It will help. The fact that the whole activity is now prohibited will give police an additional tool when they have to move in and stop this kind of activity.