Why do we call it doggy style instead of horsey style or sheepy style or cow or elephant,they all do it that way ,why dog?

Because people don't generally notice their horses, sheep or elephants fucking in the living room.

You can call it sheep-style, scotsman. Make your partner Baaaa like a sheep, too!

I could explain...but its easier to just call you a dumbass.

personally.. i thought snoop dogg just made that term up in a rap song.

^^Yeah but the term Doggystyle is what professionals call the position. and it's because we more commenly see dogs fucking in that position.