[adamanteus]

Sorry to be the odd one out, but I don't think it's right. My experience with Heterodon is limited, but when scales slough off individually in any species, this is a failed shed. A few hours in a 'wet-bag' would assist in sloughing, and that's what I would do at this point. I would say that skin should have come off some days ago. When he does come out of it just check that the 'spectacles' (eye caps) have sloughed too.