I am feeding my worms every couple of days of so with minced up veggies. But I did wait for a couple of weeks after I set up the Wormcity Wormery before I started feeding.
I put a small handful in one of the corners (as advised by Wormcity) cover with shredded damp newspaper, then in a couple of days just check how the worms are feeding, placing another handful in another corner. However If the food is not being eaten then I leave it a little longer before the next feed.
Been advised not to over feed the worms. But in my older wormery I do find that if the worms are trying to escape out the top of the wormery I feed - I think they must be looking for food.
It is a little hit and miss (still learning) but I air on the feed with caution - a little at a time and see how it goes. :-\