I have some chicks that are between 8-10 weeks old. They've been on the ground for about 2 weeks. This morning I went out and they were huddled in a corner with their heads pulled back and they kinda had their chest feathers puffed out. Today was the first cold morning. It was 33 at 8. Are they sick with cocci or a respiratory infection or just cold. I put corid in their water just in case.