I'd say be careful about adding manure. I think the worms are meant for kitchen waste / wind fall apples even news paper. They say worms only eat the soft stuff, so even it it looks like there is lots for them to eat, it's good to add extra.
I managed to kill my first lot by adding chicken manure!
I've given up with them now and got rid of my wormery on freecycle, but a few did escape into my compost heap, they seem quite happy in there!