No point feeding her if going into extended coma, metabolism will be all but stopped by 48 hours of darkness, anyhow.
Personally, I wouldn't do it, just because of the super slow metabolism that it will induce, possibly leading to THC breakdown. I also believe this technique to be a myth with no scientific value or proof that it is beneficial to cannabinoid quality or quantity. Also being highly unnatural for the plant, possibly inducing stress and negative effects as a result. Much better to harvest an unstressed and happy plant with an active and functioning metabolism rather than one in metabolic shock and with biosynthetic mayhem. Hope this helps, either way, its your choice alone. ,..... Organoman.