Please help. I have a 5 month old Sebright rooster. In the past week he's started to behave really strangely. He keeps on whipping his beak on the ground, shaking his head, losing his balance and his breath smells like poo. He's also constantly opening his beak. His chest sounds clear, his eyes aren't watery but he does sneeze a little. He's still eating and drinking and giving the dog up hill.