Sean Casey Animal Rescue in Brooklyn does great work for the animals here. I know several people (and probably some of you) who have pets from there. They currently have a shot at winning a very big donation from Chase bank if they get enough votes.
You can vote through Facebook (which I know is kind of annoying sometimes) here and it makes you allow the app or whatever, but you can check a box for it to not show anything on your account.
If you are a Chase Bank customer, you can vote here.