My male pin is a mouser. Its actually very annoying because he goes through 3-4 mice a week.

But you wave a rat in front of him and he will have nothing to do with it, then you wave a large mouse in front of him and its gone.

As of last weigh day he's 950 grams, and still either maintains his weight or adds a little every week.

It just gets expensive, especially when you feed f/t.