The ASPCA The Humane Society of the United States The ASPCA Poison Control Center PetFinder: To find adoptable pets
a new rat forum has come on the net its a place for pet rat owners to talk to like minded people about there pet rats ask questions, gain knolage and shair advice http://ratworld.forumotion.co.uk/ thought this would be helpful
I'd also add: NAIA - http://www.naiaonline.org/ And some good info about HSUS - http://www.activistcash.com/organization_overview.cfm/oid/136 (and why your money will do more to help animals at your local shelter)