Dog fighting - illegal!
If you know where & when you have a duty to report this to the police.
That activity has no bearing at all on legal shooting, fishing etc.
I work with shooters & fishermen & without exception they condemn this sort of activity (including the torture of the hare cited above).

You may as well blame old lady muggings on wildfowlers also.
(I am NOT a wildfowler BTW)