H$U$: The Human Society of the United States DOES NOT support the rescue and rehabilitation of homeless and abused animals. They are a lobbying group that uses all funds received to pay attorneys and legislatures. That money is NOT going to help an animal, it is going to politics. Keep your assistance local and you will be helping the animals that need it.
PeTA works closely with H$U$ to get a larger portion of the pet market. PeTA, regardless of the naked celebrities that promote them, does not believe in "no harm to animals." Their goal is to end all pet ownership, and to that end they are willing to lie, cheat and steal.