Help!! Lethargic baby chick!!

[chicken mama of six]

Hi, I'm new to raising chicks but have 6 adult hens that were given to me this past fall. I'm familiar sorta with grown hens molting but never raised chicks.
I have a 5 wk old Cochin who for about a few days seems lethargic and stays under brooder plate heater. She comes out eats, drinks electrolytes, maybe stay out briefly but then returns to under heater. She stays in this upright hunched posture, neck tucked in, feathers fluffed out even under brooder plate. She barely moves and she also doesn't lay down. I am very worried about her. I have several other the same age and I know they're all molting their downy feathers so I assume she is too but she looks so awful like she is dying. I've read in a few places that this can be all normal for a chick who is molting. I also had an adult hen look like this for almost two weeks while she molted so I am assuming molting but I worry about her. She lets me hold her and hand feed her. I have been giving her some very small amounts of sugar water mixture and she drinks a little and will eat some of her food soaked in it. I was able to get her to eat a little bit of a scrambled egg this afternoon.
So anyone ever witness similar and know if she is molting and maybe she is just more sensitive then others ?
Does anyone have any advice how to help her even if it is molting?
Any suggestions or advice would be greatly greatly appreciated!! I attached a picture idk if that helps anyone or not.
Thank you in advance for any advice!

 

[nuthatched]

Have you tried treating for coccidiosis?

 

[chicken mama of six]

Have you tried treating for coccidiosis?

I did mix treatment in waterers for the whole flock Friday night but then I stopped and switched to electrolyte last night.
She comes out and does drink and eat but I feel like she is nothing but bones now.

 

[nuthatched]

I did mix treatment in waterers for the whole flock Friday night but then I stopped and switched to electrolyte last night.
She comes out and does drink and eat but I feel like she is nothing but bones now.

Why did was the treatment stopped in a day?
If she does have coccidiosis, you need to direct drench her as soon as you can.

 

[chicken mama of six]

Why did was the treatment stopped in a day?
If she does have coccidiosis, you need to direct drench her as soon as you can.

Truthfully idk, I friend kept saying the flock didn't she didn't have it and she was just molting and more sensitive. Her droppings were solid she comes out eats and drinks but then goes back under so I guess I talked myself outta thinking it could be. I'm kinda grasping at anything just trying to fix her if something is wrong before it's too late.
I have the powder form of the treatment. I'll give it to her just tell me how.