3rd Week Flower/Flush Question....

I'm doing a flush tomorrow just to keep my girls healthy in the 3rd week of Flower.

When I flush, should I give them a regular feeding afterward before I put them back in the closet?

...or do I flush and put them back in the closet without nutrients, and just give them a normal feeding the next watering around?

If I flush, I usually give their regular feeding with the last gallon I pour through - never had a problem doing it that way.

Thanks dude!