Very weak

This is the sibling of yesterdays "featured" chick but this one was well & truly stuck in it's half open shell. After 12 hours, we removed the rest of the shell & laid it under mum. After 3 hours it hadn't moved, was still wet & clearly was not going to make it. We took it indoors, laid it on a hot water bottle & infrared lamp & drip fed water with a syringe. Slowly it began to come to life but was unable to move it's legs. After a few hours put it back under mum. The next morning no real improvement but took it outside with mum & sibling. Gradually it managed to stand up & by evening could move. Next day it was fine but a day or two later it became the victim of a raven!