Like Jerry said, using any type of tube is a last resort. I mean, if after only one force feeding of the liquid stuff, she was healthy looking before brumation, then I'll bet it didnt need it and would of been fine going into brumation as is. I've put skinny babys into brumation and have them come out wanting to eat-(have also had a few die in brumation I should ad) but force feeding I feel is one of the most stressful things to a captive animal, IMO.
jeff