So the girls took my 21 year old cylde mare out on a trail yesterday and after some trotting and light cantering they noticed she was gasping a bit. My BO thinks it's possibly heaves and says medication will clear it up, but that sounds scary to me! Does anyone have experience with treating an older horse? I am having the vet out this week to have a look at her and give her a check up. She seems very comfy lounging in the field and even the trot seems ok, they say it was the canter that produced the strange noises......any feedback is always appreicated! Thank you!