I saw it but cant remember exactly. So much stuff got hacked to bits. was there any and what was shown? thank in advance.

Well, they didn't call Daniel Day-Lewis "The Butcher" for nothing.

yeah, he carved a lot of pigs and people.

I swear I remembered seeing a few dogs lose it... it all ran together after a while though.

It's not in the cap report though, so maybe I'm wrong. It's a good read though.
http://www.capalert.com/capreports/gangsofnewyork.htm
you wonder why they couldn't just say it's really gruesome and be done with it.

There was the scene in which the dog was attacking the rats, and Bill's men were bidding on it.

There were a number of dead rabbits obviously, but none of them were seen being killed.