The chicks are 4 weeks old now and we took them outside for the first time, and put them in a cage. They were all doing great, eating gras and bugs, when all of a sudden my under developed chick Lemon Hunkered down started peeping and his head is jerking. He has been like this for about 10 minutes now. I brought him back in side and ihis toes are curled up and his head is still jerking. NO change. Help. What should I do?