- 21cats.org
 - Offering information about cat care, play, grieving, feline diseases, and more. Learn about their Feral Cat Co-op and foster care network. Also if you have a specific health question that does not require a veterinarian, you can call their Kitty Nurse Hotline. - About.com: Cats
- Articles, guides, photos, and links for feline care and appreciation.
- Anatomy, Behavior, and Diseases of Cats and Kittens
- Helpful overview of typical feline diseases, behaviour, and nutritional needs. Also includes info on allergies and weight control.
- Ask The Cat Doctor
- Question and answer site for cat owners, including articles, tips, pictures, and more. All questions answered by Dr. Shelby Neely, cat vet for 18 years.
- Cat Anatomy Tutorial
- Designed to be used by college students studying cat anatomy. Serves as a guide to the cat's skeletal system and internal organs.
- Cat Astrology
- What is your cat's sign?
- Cat Behavior
- Great articles on leash-training your cat, kitten development, caring for special needs cats, and cat behaviour.
- Cat Cat Cat
- Includes information on cat behaviour, cat care tips, and a photo gallery.
- Cat Fanciers
- Information about caring for cats, breeds, shows, genetics, breed rescue, catteries, and other topics.
- Cat Fun
- Funny cat poems, stories, haikus, and laws of cats.
- Cat Galaxy
- Internet radio and TV station specifically for cats to listen to and also watch.
- Cat Gallery
- Home of the original, official Cat Dictionary, you can also enter the Cat Caption Competition and read about the Bar Hill Gang.
- Cat Guide
- Animal Planet's definitive guide to cats. Find the answer to questions about your cat's health, behaviour, training, and safety.
- Cat Lovers Page
- Cat Lovers Podcast
- Blog and bimonthly podcast for cat lovers, with music, stories, and care tips.
- Cat of the Day
- Every day Cat of the Day features a new story and photo of what makes our special feline friends wonderful.
- Cat Stuff
- Celebrates one of the most wonderful creatures in the world: the domestic cat. Offers cat graphics, humour, and stories.
- CatChat
- Cat rescue resource offering shelter in the UK. Inlcudes listings of thousands of rescued cats and kittens seeking homes.
- Catkingdom UK
- Community for cat lovers to exchange information about cat behaviour and health, and to share the stories and photos of your cats.
- Catnabbit!
- Blog with news articles and postings about cats in general as well as cat profiles with a touch a humour.
- CatouWeb
- Features a different cat each month and addresses the characteristics of different breeds.
- Cats
- Celebrates cats for the people who love them with stories of origin, pictures, training tips, and descriptions of various breeds.
- Cats 'n' Kittens
- Showcases funny pictures, free cat graphics, facts, poems, and humour. Polish version available.
- Cats Cats Cats
- With interesting stories and some real cute pics.
- Cats Central
- Everything for the cat lover, including photos and cat breed information, catteries directory, cat health and cat care, cat humour, horoscopes, and more.
- Cats in Canada
- Not-for-profit database allows searches by province, breed, or cattery.
- Cats of Australia
- Breed descriptions with photos, breeder's listings, vet care, perfect cat, cat names, naughty cat, and much more.
- Cats! Wild to Mild
- Exhibition presented by the Natural History Museum of Los Angeles County tracing the natural history of the cat from wild, exotic feline to one of America's favourite pets.
- Cats.com
- Information about cat care, adoption, breeds, health, behaviour and other topics.
- Cats: Plans for Perfection
- Join the National Geographic Project Cat design team as they hone the blueprints for the 'perfect predator' a mammal that can thrive in almost any habitat on earth.
 Catsinfo
- Offers information about domestic cats including breed profiles, feline facts, health, nutrition, and more.- Catster
- Post and share your cat's photos and facts. Site enables viewing by breed, size, name, hometown, and more.
- CatsWelfare.org
- Offers information about cat breeds, behaviour, training, care, diseases, and history.
- Cattery Bocatho
- Collection of silver and gold cats and kittens. In Dutch.
- Chatterie Des Jardies
- Presents a photo gallery of various breeds of cats and information about each of them. Also includes tips about different types of cats. In French.
- Chez Fungus
- Fine virtual feline dining - parties, functions, food, drink.
- Cindy's Cat Pages
- Links, reviews, facts, and a lot more concerning cats. This site concentrates on quality with a large touch of humour.
- Comet Cursor: Cat Cursors
- Crazy for Kitties
- Celebrating cats with articles, facts, photos, games, postcards, and biographies. Features Kitty of the Week.
- Cute Cats
- Photo galleries and tidbits of kitty information where users can post their favourite cat albums.
- Cute Pictures of Cats
- Features pictures of cats and kittens. Also find funny cat videos and cartoons.
- CuteLittleKittens.com
- Submit a picture of your kitten and see how he does on the "cute or not?" scale.
- Daily Cat, The
- Feline facts, weekly care tips, breed of the week, and lots of info about cat culture and your cat's unique psychology. Includes great interviews with cat trainers and fanatics.
- Daily Kitten, The
- Publishes a new kitten picture every day at 3.07 p.m. GMT.
- Discovery Channel: Cats
- From ancient predators to perfect pets: go back through time to when big cats prowled the world and their smaller cousins took their first steps into our homes.
- Facinating Feline Facts
- The entertaining opinions of Precious the cat.
- Flickr: Airborne Cats
- Photographs of cats in various states of flight.
- Fur All Over
- Dog and cat resources, graphics, and postcards.
- I Dream Of Cats
- Community for cat enthusiasts and cat lovers. Post cat pictures and profiles.
- Index of Famous Cats
- From throughout history, both in reality and in fiction.
- Infinite Cat Project
- Cats looking at cats looking at cats. Allows cat lovers from around the world to post a picture of their cat looking at a picture of a cat that was posted on Infinite Cat Project site.
- Itchmo
- Features news, humour, and product information regarding cats and dogs for pet owners.
- Kittens!
- Simply a collection of kitten photographs -- find images of kittens romping through meadows or sleeping snugly indoors.
- Kitties I Have Known
- Pictures and stories of cats.
- Kitty Village
- Provides cat-related news, cat care articles, and feline funnies.
- Kittycat
- Online cat community for cat lovers, including various articles, photo galleries, and more on how to find a breeder, and cat adoption. Also features a lost and found section.
- Kittycat Corner
- Offers photos, chat rooms, and answers to the most common questions about cat care and common diseases.
- KrazyKatLady.com
- Features pictures and stories of personal pets, and information and tips for cat owners.
- Library Cats Map
- Clickable map of the world detailing all libraries with current or former cats in residence.
- LoveToKnow Cats
- Articles on cat and kitten health, care, breeds, general information, and cat products.
- Math Cats
- Creative, open-ended math explorations for children. Also includes cat and dog stories.
- Men and Cats
- A blog dedicated to men and their beloved cats. Submit your stories, photos, and videos.
- Meow TV
- Show catering to the interests of cats, premiering on the Oxygen network channel. Hosted by Annabelle and her cat Stinky.
- Messybeast Cat Resource Archive
- Archive of information on cat care, welfare, behaviour, breeding, and rescue.
- MessyBeast.com
- Provides diverse information on many breeds of cats, hybrid or otherwise, including cat welfare and breeding resources.
- MessyBeast: Feline Medical Curiosities
- Research article which explores the causes of various medical anomalies in cats. From MessyBeast Cat Resource Archive.
- Mikki's Cats
- Jokes, health, information on choosing vets, and links.
- Moggies: Home of the Online Car Guide
- With advice and news on feline welfare, online cat guide, photos, protection, and more.
- MuttCats.com
- Features memorial pages, message boards, articles, stories, and more.
- NATURE: Extraordinary Cats
- Read about the incredible exploits that even the most complacent fat cat can perform, and the creation of exotic breeds.
- Our Happy Cat
- A feline friendly community for a happy cat and a happy owner. Site offers practical tips on cat care and cat health, as well as a place for you to tell us all about your cat.
- Pets.ca
- Collection of Canadian owner resources on dogs and cats including information on dog and cat breeds, dog parks in Canada, and an "ask the vet" feature.
- PetStation's Cat Cabana
- Articles, photos and much more about all types of cats.
- Problem Behaviors in Cats
- Addresses problem behaviours in cats with suggested remedies.
- Pusscats.com
- Information about cats and kittens, including care, breeds, and behaviour, as well as pictures and a forum.
- Sativa's Home Page
- Training tips for cat owners including behaviour, introducing a dog, and more.
- Shopcat.com
- Dedicated to the "working" cats of the world. Pictures and stories about each featured cat.
- Singapore Cats
- Photos and descriptions of the Singapore 'drain cats'. References and links for cat interest.
- Supreme Cat Show
- The UK's top cat show, open only to cats who have qualified at championship shows.
- TheCatSite.com
- Helps you to create a web page for your cat. Also includes information, forum, shop, eCards, and more.
- Tiger in the House, The
- Book by Carl Van Vechten looking at the cat in folklore, the law, in music, in art, and in fiction.
- Vicki Whyte's Ultimate WWW Cat Page
- Features cat owner tips, pictures, and stories of personal pets.
- Why Cats Paint Online
- Aims to preserve the movements, marks, and sounds of non-primate species and consider them, without prejudice, as modes of aesthetic communication, in the hope of gaining new insights into our world.
- Wikipedia: Cat
- Hyperlinked article on the small feline with characteristics, domestication, breeds, history, and more.
- You and Your Cat
- Cat resources from the Best Friends Animal Society. Offers a collection of articles, guides, and manuals addressing cat behaviour and training, health and care, and living with your cat.
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