Its & It's

Rover is a Dog. Rover has a Bone.
Its Bone.
Rover's Bone.

Rover was recently Cloned.
There are now Six Rovers.
How many Rovers? It's Six.

Did you notice that The Use of The Apostrophe
Is Exactly The Opposite for The Word -It-
As it is for A Proper Noun ( Rover ).

That is Stupid.

i was also thinking that The Apostrophe does work properly sometimes.
Rover is going to The Alley.
Rover’s going to The Alley.