EV reducing berries reducing EV's to 0?

Question

So, I've asked before about these, but I've found that I can use them after the EVs have reached zero...unless I've been keeping track wrong...
What I'm asking is, has anyone who's done ev training encountered a time where you could keep using an ev reducing berry after the ev in that stat has reached 0?

Answer 1

No once you hit Zero Evs the berries will no longer work.

Answer 2

They won't work anymore once you hit 0.