Make your own or buy the cardboard bedding. Shredded corrugated cardboard is a very good worm bedding. There’s no reason to add any food or nutrients to shredded cardboard bedding. When the cardboard is made they use a glue to hold it together, that glue is mostly made of animal by products which is a perfect food for worms. The shredded cardboard bedding also retains water well and settles in layers, which makes it easier for the worms to tunnel. You should find that your worms will be healthy, firm and grow large. Don’t add any food, just keep the cardbord damp and they’ll be good to go. Good Luck!
BIRDDOG