SheepWatch

This is an updated version of SheepWatch which works with Burning Crusade

To resheep a mob you need the following macro:

#showtooltip Polymorph
/focus [button:1]
/cast [button:1] Polymorph; [target=focus,exists,button:2] Polymorph

Which will:
left click: sheep current target and save target
right click: sheep previously saved target (with out changing current target).