For the first week old towels, bed sheets or puppy pads will work just fine until they have learned what their feed looks and tastes like.
Having them on shavings too early can lead to chicks ingesting the shavings and as a result suffering from crop impaction leading to starvation.
You can...
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Your chick might have ingested some of the bedding which is now obstructing the passage of her crop contents.
You can provide granite grit chick size to help digesting it and Coca Cola instead of water as a dissolving agent. The sugar will help to perk her up...