Ok, I took my gelding to a show (we do eventing) and we were going Cross Country. We were going training level. He's been to about 6 training level shows and has been fine. But when we got to jump 7 my horse started coughing really bad, so I retired on course. I took him back and he was fine. Then a few weeks later I was at a riding lesson and my horse kept nipping at his stomach. So I took him back to the barn, untacked, then his nose started bleeding. Could these be signs for something more serious like blood being in his lungs? I had the vet check him out after the show where he started coughing and didn't see anything wrong. What could this be?
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