If vitamin deficiency - how long before you see improvement

[MarlaMac]

Went back to the vet with her today, because no improvement since Friday. We decided to euthanize her. Although she was eating when possible, and on high dosed vitamins, she wasn't able to get up, just creeping around the box on on side with feet trembling.
I still hope it was a a severe vitamin deficiency and no virus. The others are still in top form, fingers crossed that this was an isolated event.

Sorry she didn't get better. Hope everyone else stays well!