One of my female is SUPER fat!!
I am putting her on a one adult mice every month diet. She is still super fat right now. She was a thick as a ping pong ball.....and only 4 feet something....now she is getting a lot better and going to be eating an adult mice ever 14 days or so. So if you want to make them go on a diet, I think that your 14 day schedule is good enough! And make them move!!!