So yesterday I fed dry hay to the boys - I have been steaming the hay, but lack of preparation in the morning meant chucking dry hay in as a one off. In the afternoon I grab Tom out of the stable to do some work in the arena. On the lunge he was continually straining to cough. I carried on for a bit to see if it would clear, but it didn't. I pulled him up and his breathing sounded "raspy", like he had gunk he couldn't shift.