my recommendation to you is KEEP HIM ON RATS!!!!!

i was just looking thru the pages of my notebook of my BP's history (i write everything down since i got him 2 years ago) and i remember him eating rats alot bigger than he was supposed to be getting no problem, and on sept of 2011 when he weight around 550g he took down a 118g rat! after that he was taking down 70-90g rats, until i got lazy and just started getting mouses cuz they were easier to get around where i live, what a mistake that was, my BP has been a mouser and only eat 20-30g mouses for a year now, and wont touch a rat,

so KEEP FEEDING HIM RATS! dont let him loose the taste for em.