I received an order of BSFL from Symton's recently and found that they have changed the substrate packing. It used to be a kind of damp soil. Now it appears they are using crushed walnut shells. While this makes it easier to remove the substrate from the worms, do be very careful to remove all of the crushed walnut from the worm before feeding it. Crushed walnut has been reported to cause impaction and internal injuries from those who have used it as substrate for their tanks. Just be conscientious about cleaning the worms before feeding them to your dragons. I've been able to do this pretty easily by just brushing each worm off with my fingers. The label suggest rinsing them in water which will work too but will make them stickier and allow them to climb if not dried off.