A small type of Cat that is seen around some NPCs and most of which can be purchased from the Crazy Cat Lady as a "vanity" pet in the Elwynn Forest. One type can be purchased from Lil Timmy ([1]) in Stormwind.
Crazy Cat Lady Housecats
Bombay
A black cat with golden eyes. Summoned by Cat Carrier (Bombay): [2]
Cornish Rex
A cat colored with splotches of orange and white, with dark yellow eyes. Summoned by Cat Carrier (Cornish Rex): [3]
Orange Tabby
An orange cat with deeper orange stripes and golden eyes. Summoned by Cat Carrier (Orange Tabby): [4]
Silver Tabby
A silver cat with black stripes and yellow-green eyes. Summoned by Cat Carrier (Silver Tabby): [5]
Lil Timmy Housecat
White Kitten
A small white cat with golden eyes. Sold by Lil Timmy, a rare spawn in Stormwind.
Summoned by Cat Carrier (White Kitten): [6]
Drops
Black Tabby
Dropped by Dalaran Spellscribe: [7] Summoned by Cat Carrier (Black Tabby): [8]
Prior to Patch 1.6, this cat was known as the Maine Coon, but this was changed because the game's Profanity Filter censored the word "coon" for also being a derogatory term for people of African descent.
Siamese
A cat with a cream body, white paws, brilliant blue eyes, and brown ears, face, legs, and tail.