Here we have a 2017 Swedish animated film that is starting to hit in other countries. It’s about a old Police Chief getting an new young mouse assistant.
“The forest’s police chief Gordon is about to retire and he needs to find a new assistant. Paddy, a clever mouse with a great sense of smell seems to be the right candidate. Together they have to solve Gordon’s last case – the mystery of squirrel’s missing nuts. Could it be the fox that took them? Gordon and Paddy will soon find out.”
Here is different version of the trailer that can’t be embedded on Vimeo if you are curious.