
Nah, i think you need time and exercise, not extra food...
If extra is just coming out as more waste then its not having the desired effect as she just doesnt need it.
Id work out a program of gradually increased exercise over the next few months, doing some speedy walking up hills, bit of controlled jogging, some munching on big chunky raw bones (great for neck and shoulders and jaws), much more likely to build up some nice muscle front and back, which is giogn to look nicer than excess fat.
Em