right on the temps what was said, warm it up...second as a medic...gonna kick in here with what I did for a chick that was lethargic....
I got a srygine, and a IV cath...maybe you can buy one in the drug store...an IV cath...will have a needle...its what is used to start IVs....they stick that into your a/c arm...and pull out the  needle and the CATH stays in to administer fluids...
I remove the needle part, and discard, where others wont get stuck...then I attach the CATH part to the srygine, should screw on...I make water about 1oz, and either add two drops of clear sryup, or put a pinch of sugar into the water..mix it well, draw it up into the srygine...and slowly and VERY CAREFULLY, adminster some to the baby chick,....
CAREFUL, YOU CAN PUSH TOO MUCH WITH A SIMPLE SQUIRT..HAS TO BE DONE VERY VERY CAREFULLY...it might need sugar in its system to help it thrive, or you can buy some vitamine powder to mix into the water...
GOOD LUCK...mine did well when I did this.