I don't know where on earth you got that information, but it is about as wrong as it can get!!

That baby needs 1 large hopper/small adult mouse WEEKLY at minimum. There is no way ANY snake can live on one tiny meal a month for very long. You are in fact, starving that baby to death. Not on purpose of course, but you are.

Because he's so skinny, I recommend 1 small adult mouse every 5 days for about 3 months, then bump the food up to weaned rats and the schedule back to every 7 days, and he'll plump up like a healthy baby in no time!

Gale