I have a rooster that is white faced spanish black. He got ND (Newcastle disease) like 2 weeks back. Though he had no nervous system/paralysis symptoms he has become very weak and wont eat anything. I give him porridge in water with dropper but he is not getting any better. He has difficulty breathing with a loud sound and his poop is also liquidish with dark green color. I am giving him multivitamins and an antibiotic . He is a fighter and has been through hell. Any insight or suggestions on how to make the situation better will be greatly appreciated. Thank you !