I find it really hard to tell on our Super Mohave BEL. She kinda turns pink all over at first. Even the opaque eyes are hard to judge since they're so light against the white background. Once she's really in shed her belly goes quite pink and is then noticable. By then she gets inactive and stays in her hide. Once she's out and about again, we will find the shed somewhere in her enclosure.

Its much easier to judge when the axanthic is going into shed.