is that the only poop it had?
I was asking you to check it's crop because the way chickens eat, they eat until their crop is full. .. then the crop slowly empties as the food moves further down their digestive system.
Baby chicks should all have a full or mostly full crop when they nap...
if the crop of the peeping chick is empty, I would work hard to get it to eat and drink.
If the crop is full, the bottom is clean, and the temperature is right, and it STILL keeps peeping. .. there might be something internally genetically wrong with it. Just keep caring for it... but it might...