My piggy Davey had an upper respiratory tract infection 2 weeks ago and was treated with Septrin. He was fine after a day or so, but we continued the antibiotic for the whole course (5 days). The vet said that it was like a mild cold and as they can't blow their noses, the breathing sounds noisier. But he gave us antibiotics to be on the safe side. He is normally housed on vetbed, but I was doing a big wash this weekend and had no spare bits so I dressed his run with newspapers and loads of hay. He was jumping about in it and loved it. He is housed indoors at night. This morning, I was awoken by husky, raspy breathing, just like the symptoms he had previously. I wonder if the hay was dusty and has irritated him? The breathing had settled down by mid morning. He is eating normally and is alert. I gave him 0.2mls of Tixylix chesty cough medicine for kids, which he liked. Has anybody else experienced this?