Thanks for that suggestion Dan, I hadn't heard of that before. I'll bear it in mind for future detection of pre-moult state 
Unfortunately the underside of her carapace does glow orange on application of a torch, so it looks like I can rule that out too.
All I can do now is wait and see if she improves over the next few days.

Unfortunately the underside of her carapace does glow orange on application of a torch, so it looks like I can rule that out too.

All I can do now is wait and see if she improves over the next few days.
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