My BP is an adult male and I am just curious how often ya'll feed your adults?

I feed him 1 F/T medium rat every 12 days however sometimes he likes to stretch it to every 14 days. Someone here awhile ago suggested I try to get him to eat every 10 days or so. However, it seems he is never interested that soon. So am I right in thinking that he'll eat when he is hungry? Is it necessary to keep trying to offer it at the 10 day mark?