My Sakura is a mouser! She has helped me catch and release two mice at the shop where I work. I soon found how they where getting in and sealed the hole. No mice seen or heard so far! Out of the 4 dogs at the shop, she is is the only one who hunts the mice. My boss loves her. She stills looks and sniffs all over the shop just in case every morning when we get to work.
But her need to hunt is a new thing. As a puppy I had pet rats and she had no interest in them. Now she wants to get at the hedgehog and bearded dragon I have now. My little man Axel is just starting to get the hunting thing from her but he isn't as obsessed about it as her. And the dragon scares him.