I recently just hatched 5 polish bantam chicks yesterday. 1 chick had issues hatching, it zipped all the way but couldn't get out of the shell. It took so long that it shrink wrapped so i put a straw through the incubator to add some moisture to the egg. It eventually ended up hatching but it was very weak. It also had a unabsorbed yolk sac attached. a egg shell piece dried to its sac and now its having issues. Ive tried using warm water to separate the egg shell from the sac but its not working. Ive got it loosened from the butt but not the yolk sac. Its hard to keep it out of the brooder to get the shell off because the chick keeps getting cold. Ive put it back, but it looks like its suffering. It was getting picked on by the others so i moved it into a tissue box in the brooder. What else can i do? Is this hopeless?