I went back to 100% for all but white and added that back after a couple days. For what it's worth, my dinos were even worse ~4 weeks after my blackout so ymmv.
Dinos can surelly come back after a blackout, and very often do when it is the only action taken, reason why I think it helps when they are neraly gone, but there’s no reason (scientifically speaking and experimentally doing) to think they can worsen BECAUSE of the blackout.