Pluto is the third planet in Chicken Evolution. It is unlocked with 10 Diamonds after reaching the second level on Mars "Mars World".
The chickens on Pluto are in geometric shapes and produce Sapphires. Like on Mars, eggs can be bought with Sapphires to hatch new chickens.
The chickens on Pluto will freeze after a while and stop producing sapphires until you unfreeze them. To do that, you have to hit the ice block five times. You get Sapphires as a reward whose amount depends on the chicken race. The time until they freeze can be extended by upgrades (10min without upgrades, with Sapphires up to 19min and with diamonds up to 25min).