I'm looking for a solid, healthy feeding guide for the animals in the Morelia family in reference to the animals length or weight. I believe all the animals in the Morelia family share the same body proportion in relationship to their girth and length. I realize most people base the size of the rodent off the animals girth alone. However, if the animal is over/under conditioned this wouldn't be the best way. I don't have a scale to weigh my animal or the rodents I feed her, but would consider getting one if I could base the animals weight to selecting the correct rodent size. It seems as though, on average most snakes will or should reach their full adult size at 4 years old. I have firmly decided to feed one (1) "appropriate" size rodent each feed more frequently instead of multiple rodents less frequently. When I say "appropriate" size rodent, I mean that the animal and rodent both share close to the same girth. I am very surprised that this information doesn't seem to be available by now, and any recommendations would be appreciated. For example,

2ft Length = 1 Fuzzie Mouse @5 Days
3ft Length = 1 Hopper Mouse @5 Days
4ft Length = 1 Large Mouse/Rat Pup @7 Days
5ft Length = 1 Small Rat @7 Days
6ft Length = 1 Medium Rat @10 Days
7ft Length = 1 Medium/Large Rat @10 Days
8ft Length = 1 Large Rat @12 Days
9ft Length = 1 XL Rat/XS Rabbit @12 Days