ASPCA:Focuses on rescuing and protecting animals across the U.S.

Best Friends Animal Society: Aims to make all shelters no-kill and runs the largest no-kill sanctuary.

PetSmart Charities: Supports pet adoptions and animal welfare programs.

The Animal Rescue Site: Provides food and care for shelter animals through donations and purchases.

PAWS: Rehabilitates injured animals, shelters pets, and promotes adoption.