Yesterday I took Berdi for a ride like usual and everything was going real good. We did lots of walking and trotting and she was doing a real fast trot and enjoying it. When I asked her for the canter, she quickly responded, but a minute or so into it she started coughing. Almost like she couldn't get her breath. I halted her and she kept coughing for a few seconds. She however wanted to start trotting again and was fine. When I asked her once more for the canter she did the exact same thing. She has always been perfectly fine before and I can't figure out what changed. It was only about -10 C out so it wasn't that cold - I've ridden her in much colder and she's been fine.
Sometimes as we are riding, she will give little snorts like she's saying "lets go faster!" but never coughing like this. If anyone has any ideas why she's doing this I would really like to know! Thank-you!