I've been feeding my beardie BSFL (Nutrigrubs) and noticed some of them are turning black colors is this okay to feed and what does it mean when they are turning colors? Also noticing in the cup looks like they are shedding or pieces of their skin is falling off.
They can be fed when they turn black. They are about to hatch into flies at that point. You can also feed off the flies when they hatch. They're fairly slow moving and easy to catch.