So the other day my rooster tried eating a big piece of bread. Every since then he hasn't been himself. He's not crowing, he has slime forming on the corner of his mouth, he makes like a rattly noise when I try to massage his throat, and he's no longer active. He only slightly holds his mouth open part of the time. No neck stretching, no obvious gasping. But it's slowly getting worse. He's a frizzle bantam and so sweet. Any ideas how I can help him?