I WISH it was alone - it was in with 16 other hatchlings from my own eggs and 7 shipped cochin chicksFirst of all dont freak - most of what you described can be caused by many things including humidity, delayed hatching caused by low temps.
Contact the supplier - see if he/she has chicks dropping dead but I highly doubt it.
Your lone chick sounds like it is suffering from anxiety of being alone. Get it a friend


