Update:
I have been giving her that supplement in her water. and she is very hungry.
Last night she some how escaped, which i cant see how as there is 2mm gap around the top for air and some small ir holes and its got a latch to keep it closed. but she got out! i found her inside my girlfriends shoe hiding from the kitten but also plotting to eat the hamster. as the shoes were on a shelf right beside the hamster.
so i have her in my Cleaning tub right now. will be moving her OT a more secure enclosure soon.
So its been a week. only one more to go before i can feed my hungry girl. and cross my fingers.