I am getting ready to start my first worm farm. It will be small-scale, in a plastic storage box in the house. I have read various things about starter substrate for the worms. Some places suggest newspaper, some wood chips, some potting soil. I have rodent pets whose bedding (aspen shavings) and waste (poo pellets) I compost. Do you think this bedding waste, dry, would be a good starter substrate for the worms?