Minecraft wiki entry for Ocelot, associated text: Ocelots spawn above grass blocks at sea level (y=63 per default) or higher in groups of 1 or 2. These are mostly adults but sometimes ocelots spawn as a kitten. When an adult ocelot spawns, there is a 1⁄7 (14.3%) chance for 2 ocelot kittens to spawn with it; this chance includes any kind of spawning, including spawning naturally, by a spawn egg, by the /summon command, or a mob spawner.