Possible Clues:

• Pro-critter org.
• Pet person's org.
• Humane gp. for 150+ years
• Org. whose motto is 'We are their voice'
• It has a facility with animals: Abbr.
• Org. that runs shelters for dogs and cats
• Watchdog grp.?
• Toy-protecting gp.?
• Humane grp.
• Adoption org.