The animal that has the grossest poop is the blue whale.
Other animals that have the grossest poop are elephants, goats and sheep.
The cleanest animal in the world is actually a pig.
Although it may seem strange that a pig could be the cleanest animal in the world because they like to play in mud it's actually true that pigs are one of the cleanest animals in the world.
Pigs also do not sweat which is also another reason they are the cleanest animals.
Pigs are unable to sweat; instead, they wallow in mud to cool down.
The pigs mucky appearance gives pigs an undeserved reputation for slovenliness. In fact, pigs are some of the cleanest animals around, refusing to excrete anywhere near their living or eating areas when given a choice.
Birds are also another cleanest animal but pigs are the cleanest animal in the world.
Other animals that are the cleanest in the world besides pigs are.
Dolphins.
Dogs.
Polar bears.
Whales.
Tigers.
Rabbits.
Chickens.
Deer.