Shed bnb?

We have a lodger in our shed. We suspect it is a wee mouse (or mice). A few weeks ago now , we noticed a variety of 'stuff ' appearing on the shed floor, sourced from our bunny straw and from outside the shed. The bird seed bag had also been nibbled into.
Now I know a lot of people would then want to get rid of whatever critter was responsible, but given that our cats do 'like' more than their fair share of rodents, I decided to adopt this one. So I leave out some seeds for it.
The wee thing has now decided to build its home on the flowerpot saucer I left the seeds in. Either that or it is trying to repay me the only way it can!