No, no other symptoms. I dusted him with diatomaceous earth in August. We had an outbreak of some sort of mites in May. I'm wondering whether the d.e. could have caused a respiratory infection. He's a mean boy. No way I could look down his throat, but I will ask the vet to do so tomorrow. That's what they get paid for; right? LOL. I did go in the coop late last night, wearing very thick gloves. When I held him around the chest wearing them, I thought I detected a bit of noise with his breathing, which I can't hear when squatting right next to him. The vibration I could feel through my gloves, I mean. Not bad or loud, not raspy or gurgling, but something? A bit of respiratory distress, I would guess.