Pecksley is our 4.5 month old Salmon Favorelle. He's been crowing just fine - until today. Whenever he tries to crow it kind of comes out like a little cough/sneeze. Sometimes when he breathes it sounds a little gurgly, like he has a frog in his throat. His eyes and nostrils are clear. No unusual discharge from anywhere. He's acting fine otherwise. He's eating and drinking fine and there is no sign diarrhea. He looks to be breathing normally. He's not struggling for air. He is a house chicken - only been outside a few times this summer. I do have a couple of antibiotics but I don't want to use them unless he needs them. Can anyone give me some idea what I should do for him?