When playing any level with Motley if you press q,w,e in quick succession he will bite the sheep nearest to him causing it to jump over any obstacle.
Adam Half Pint can drop pints to get the sheep to follow him. Apparently you have to type pint really quickly while holding down Alt + Shift.
The Modern Pastoral sheep can be made to follow any character by chasing them around the same object five times! Try this one at your own risk. If doing this one with Shep you run the risk making him puke.
Press Esc to open up the menu and then type: CancelCheats
All cheats will now be deactivated.
Press Esc to open up the menu and then type: PooSheep.
Hit esc to open up the menu then type: FatSheep to make the sheep grow up 150% larger.
Hit esc to open up the menu then type: MiniSheep
Sheep will now be half there normal size.