What would you do to someone who constanly is cruely beating his pets/animals?

Okay so I’ll explain this a bit.

I won’t give any videos because I saw too much and it made me really sad and angry at the same time.
I saw some movies [I don’t even understand how can someone record them ... this is beside the point] where owners of animals got furious on things and just bashed their animals leaving them close enough to die…
I had a neighbour like this who liked to bear his dog. One day I told him if I ever hear the dog crying one more time because of the beating I’m just gonna break one of his hand [which I did at a point]. He stopped after that but why has it come to such solutions sometimes.
Where I live there aren’t many laws to protect animals but I saw enough domestic violence against pets in US and there’s an animal police there and a lot of laws protect the animals.

What would you do to someone whop beats his animals/pets?