If a link no longer works/is updated, please PM me. Feel free to post on this topic if you have a topic that should be added to the list!
Mammals
Bear Lovers United
Big Cat & Captive Animal Crisis Club
Cat Chat
Cow Chat
Dog Owner Chat
Ferret Alliance
Goat Chat
Guinea Pig Club
Hedgehog Society
Horses and Riding
Pitbull Chat
Rabbit Owner Chat
Rat Chat
Rodent Enthusiasts
Service/Emotional Support Animals Chat
Birds
Pet Bird Chat
Poultry Lovers
Reptiles
Dinosaur Enthusiasts
Reptile Chat
Snakes
Fish
Crustacean Chat
Fish Lovers
Amphibians
Pet Amphibians
Other
Invertebrate Enthusiasts
Bear Lovers United
Big Cat & Captive Animal Crisis Club
Cat Chat
Cow Chat
Dog Owner Chat
Ferret Alliance
Goat Chat
Guinea Pig Club
Hedgehog Society
Horses and Riding
Pitbull Chat
Rabbit Owner Chat
Rat Chat
Rodent Enthusiasts
Service/Emotional Support Animals Chat
Birds
Pet Bird Chat
Poultry Lovers
Reptiles
Dinosaur Enthusiasts
Reptile Chat
Snakes
Fish
Crustacean Chat
Fish Lovers
Amphibians
Pet Amphibians
Other
Invertebrate Enthusiasts