How much does she weigh? Has she lost weight? 3 weeks isn't that much for a BP that has adequate body weight. I have had Bp's fast for 4-5 months with no ill side effects. I didn't read your other thread but if the snake is getting antibiotics it probably won't want to eat. Force feeding is extremely stressful on a snake and should only be done as a last resort. if she isn't loosing weight and sunken in i wouldn't force and just wait till she is better. if she was eating small rats and is 9 months old I would figure she has some size to her?