How can I help the malevolated cow and sheep find a new torture device?

Hint 1 of 8:

The cow will complain about the lack of a new torture device.

Hint 2 of 8:

It seems that the cow and sheep have tried every violent torture device
possible.

Hint 3 of 8:

You will need to find something different.

Hint 4 of 8:

In many cartoons, one character might tickle another character with a feather
as a form of non-violent torture.