Unicreatures Hatchery - Add a creature
To find your creature's code, go to the creature page and look at the address bar. It's the digits at the end:
e.g. for http://www.unicreatures.com/view.php?id=7646095 the code is 7646095.
Choose the shortest level as creatures will be displayed by the lowest number of clicks required to reach their target. If you choose fewer care points than the creature already has it will be removed from the hatchery almost immediately.