Birds: Association of Avian Veterinarians (http://www.aav.org)
Reptiles: Association of Reptile and Amphibian Veterinarians (http://www.arav.org)
Reptiles and amphibians: Melissa Kaplan’s Herp Care Collection (http://www.anapsid.org)
Small mammals (e.g., rabbits, ferrets, guinea pigs, chinchillas, hamsters, rats, mice, gerbils, and so forth): Association of Exotic Mammal Veterinarians (http://www.aemv.org)
Rabbits: House Rabbit Society (http://www.rabbit.org)
Ferrets: American Ferret Association (http://www.ferret.org)
Sugar gliders: Association of Sugar Glider Veterinarians (http://www.asgv.org)
Potbellied pigs: North American Potbellied Pig Association (http://www.pigs.com)
Hedgehogs: International Hedgehog Association (http://www.hedgehogclub.com)
Guinea pigs: Guinea Lynx (http://www.guinealynx.info)
Rats and mice: Rat & Mouse Club of America (http://www.rmca.org)