One important factor is what has happened to or with the forage base while you've been doing the LMB culling.

If you've amped up the forage bass during this process, I would think you would see progress within 6 months to a year.

But let's see what others have to say, as this is just my guess.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."