PetHobbyist
An online pet community.
http://www.pethobbyist.com/

Pets On The Net
General and species specific forums.
http://www.pets-on-the-net.com

Pet Advice Network
This forum is for smaller pets including ferrets, rabbits, rats, and hamsters. Other features include links, photos, and FAQ.
http://www.petadvice.net

Cats-n-Dogs
A place for cat and dog lovers to gather, share interesting stories and tall tales of their beloved pets.
http://catsndogs.c-double.com

Petlovers
Pet forums. Topics include general, pet pics, cats, dogs, fish and reptiles.
http://forums.petlovers.com/vb/index.php?referrerid=mrparrot

Pet Chatters
A community of long time and new animal owners and those that love the animal world. For exchange of information and help with problems.
http://groups.msn.com/petchatters

Pet Lovers Forum
Discuss an array of pet topics.
http://www.petloversforum.net

Acme Chats Pet Community
All ages chat and message board. Features general pet discussion, photo contest, links, and species-specific talk including reptiles, fish, cats, and dogs.
http://www.acmechats.com

Annexcafe.com Webchat
An irc chat server including an animal specific chat room called #Animalchatters.
http://chat.annexcafe.com/webchat/config.asp

Pets Forum
Discussion of pet care, ownership, and breed information.
http://ths.gardenweb.com/forums/pets/

PetPeoplesPlace Pet Forum
Offers a place for enthusiasts to discuss fish, birds, horses, cats, dogs, and exotics. Contains a photo gallery, polls, and memorials.
http://www.petpeoplesplace.com/system/forumindex.php

The Disabled Animals' Club
Meeting place for owners of animals with disabilities. Forum, information, contacts, and links.
http://www.disabledanimalsclub.co.uk/

Pet Discussion Forum
Discuss pet care, pet training, pet rescues with other pet lovers.
http://www.petdiscussion.com/

Furkids.net
An online community of pet lovers, rescuers, and responsible breeders. Topics include pet grooming, conformation, pet health, and nutrition.
http://furkids.net

Zoomunity
Forum for discussion of pets and other animals. Topics include pet products, veterinary issues, behavior and training as well as animal husbandry and care.
http://www.zoomunity.com

The Furbaby Place
A pet forum for pet lovers of all types. Featuring: chat, contests, photos.
http://petforum.bravehost.com/

Pets Fanatics
Forum for fishes, birds, cats, dogs, hamsters. Get free advice on setup, breeding, diet, health, grooming, training, behavior from a professional breeder and trainer.
http://www.petsfanatics.com/

Understanding Animals Pet Behaviour Forum
A forum for the discussion of pet behaviour problems in dogs and cats.
http://www.understandinganimals.com/forum/index.php