My female, Sonja, is around 3.5-4 years old now, is 8ft long and 25+lbs. She's still growing at a good pace too.. For prey, she gets one 2-2.5lb rabbit every 4-5 weeks, which seems to suit her fine. Keeps her at a very healthy, lean weight and she's not grumpy in between.

I feed her rabbits because they are younger and leaner, whereas Jumbo rats(she only gets f/t regardless unless I can find an appropriately sized rabbit in town) are older and much more fatty. The rabbit also keeps her satisfied alot longer than 3-4 jumbo rats. These are meat rabbits that are human-quality too, not some lop-eared rabbit from the pet store, haha.