Make the sheep fluctuate in the air like helium balloons:

/effect @e[type=sheep,r=5] levitation 999999 1 true

Make the sheep silent (works only on JAVA edition):

/entitydata @e[type=sheepmr=5] {Silent:1}

Click HERE to download the MCPE world

How to import:

1- Download the world

2 - Click on the downloaded file and the game should open with the world straight loaded.

HELIUM BALLOONS

Command blocks

Tutorial viewed            times