Hi, I was wondering if anyone knew what could be wrong with my 4 month old RIR bantam. He is kind of just sitting there, closing his eyes, with his tail down. He is shaking a little like he is cold but it is 90 degrees out. He had a green, runny stool. He is normally active, so I know something is wrong. You can tell he is sick by his eyes. What can I do to help him and what is wrong? Thanks everyone.