Is my millipede sick?

RealBugs1

Arachnopeon
Joined
Aug 2, 2019
Messages
5
She used to be a medium gray with slight yellowish stripes, but now she's turned a darker brown with more intense lighter stripes. For the past few days she's stayed curled up on top of the substrate in the corner. She still moves a little when touched, but seems very lethargic. I have 3 pedes, Moe Larry and Curly, all girls, and the other two, Moe and Curly, are healthy. I've had them for about 4 months and they've always been very active and had healthy appetites.
 

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RealBugs1

Arachnopeon
Joined
Aug 2, 2019
Messages
5
Update:
I touched her yesterday and she moved a little. This morning, her top half is darker and her bottom half is whitish yellow, and she's uncurled a little.
 

RealBugs1

Arachnopeon
Joined
Aug 2, 2019
Messages
5
Thank you. I thought I heard they smell bad when dead, but I don't smell anything. What would cause her to die mid-molt?
 
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