I'm not sure about the vitamins, but you could power feed. I don't like it personally because the female will lay smaller clutches and more slugs. I would personally just wait. She will come around when she comes around. Also beware of the 1000g hunger strike. Sometimes it happens, other times it doesn't. All mine did though
My Special Female just decided the last 2 feeding days to go on a hunger strike. She is almost 900 grams. I hope it doesn't last too long.
1.0 Banana Mojave
1.1 Super Pastel
1.0 Super Lesser
1.0 Mystic
0.1 Lesser x Mojave
0.2 Lesser
0.1 Spider
0.1 Special
0.1 Fire Spider
0.1 Enchi
0.1 Super pastel Pinstripe
0.1 Butter
0.1 Super Pastel Mojave
0.7 Normal
0.1 Pastel
0.1 Cinnamon