I put about 16 ounces of worm food in a terra cotta planting pot
and then in the bed
because It was wetter than the Advisors seem to advise and I wanted to see what would happen. In a few hours or less, a crowd of younger worms were aggregated under it. "Adolescent" size.
I lifted it, some of the gruel drooled into the bed. There were worms in the drool. They were moving into this quite wet
stuff.. That's in the Worm Inn. In the plastic tubs, I find more worms where it's wet than elsewhere (except in the horse manure). I use a terra cotta worm stuck in the bed to assess the moisture. And when I can find it I check it with the moisture meter for my information.
One commercial vermicomposter (as I recall with uncertainty) recommended 75% moisture.