Although the old icon has been changed, you might want to ask the trademark / copyright holder(s) for permission to use it (or a revised version of it). The holders might see the humor in it, might decide it is only a spoof and doesn't infringe, the icon metadata could read "used with permission", or... ? Nobody knows without asking.
+1, that was my first thought too!
Hee hee - that might cause other problems - I read that the sheep was named "Dolly" in honor of Dolly Parton.
I would add two sheep.
I think it should be 2 sheep offset one in front of the other.. In other words take yorik's current replacement and use sheep instead