If she is eating every week and still losing weight, that can be a sign of a parasite. Have you ever had a fecal test done on her? Also all of my bps are '10s, but all under 400 grams, even a little female at 105 grams. They all grow differently, and I think as long as she's eating well, maintaining/gaining weight, and has a negative fecal there's no need to worry about power feeding her.