The cat

A group of mice got together to decide what they were going to do about the cat that was terrorizing them and catching the baby mice and carrying them away. They all agreed that this could go on no longer and that they would have to do something to get rid of the threat. They held a council and decided that the best way to get rid of the problem was to climb onto the cat's back and to put a collar on so that the beast would be tethered and leave them in peace. They were delighted at their plan and sat down to a feast together, and after they had eaten they congratulated themselves on their scheme.

But then a mouse asked. "But which of us is going to put the collar on the cat?"