This is a sixteen week old brown rooster been really healthy up till 5 days ago. The coop is a cement floor with aspen wood shavings. Coop is not insulated but draft free with great ventilation. Been feeding the TSC brand finisher pellets for now. Day 1 lethargic would not leave the coop. Still eating, and drinking. Would stand if forced to. Slept on the lowest roost. Day 2 still lethargic, he was sleeping on the floor and not on the roost. Would not move when the hens would step on him.Would not stand on his own. Notice runny poop with flecked white and black flecks in it. Kind of like uncooked egg white with crushed rice and brownie crumbs. Day 3 Won't move or stand. Hens pecked out a patch the size of a loaf of bread on his back. I moved him into his own heated pen on that night. I fed him yogurt and bread crumbs. All food and water needs to be right next to him. Day 4 Still drinking water with electrolyte but only if it was right next to him. Eats very little. Some wetness on the tip of his beak. Day 5 Eats less, still runny poop, still does not move. I bought VetRX from TSC. I also bought Poultry Nutri-Drench. I have not administered any of these. Should I try these? What else could it be? I cannot take him to the vet. Financially not capable too as the nearest chicken vet is 1 hour 15 minutes from me and wants $65 to just look him over. With gas at $3.99 here, that is not happening. Please give me some ideas.