I had a salty granduncle whom I only met a few times. Once when we were visiting, a neighbor of his came bay and asked if the uncle would "catsit" for him. Uncle Blunt (Probably not his name, but that's all I ever knew by) asked, "does he like mice?"
"Oh yes!" the neighbor assured him. Uncle Blunt agreed to catsit.
The next morning the neighbor came by with the cat and a mouse trap. Looking at the trap uncle Blunt asked, "What is that for."
"Why to catch mice for the cat," came the answer.
The cat stayed in a cage and didn't get any mice while at uncle Blunt's house.