So, four horses have died at the Calgary stampede. One was euthanized due to an injury in the chuckwagon racing, which is hardly surprising. But two of the others were heart attacks - I find that odd since I didn't think horses had heart attacks that often. If they did I would expect to see more of it in eventing where horses are working hard. Could heat have been a factor??
Then there was a horse that broke its back after bucking without a rider - I guess the horse still thought the rider was there so it bucked harder than it should have without the added weight?? But a broken back just from bucking also seems strange to me.
Here's an article: CBC News - Calgary - 4th Calgary Stampede horse dies