(Mild trigger warning: the dog shown is in distress, vomiting, and the imagery may be upsetting to some viewers.)
This article contains a valuable video that shows the signs of bloat in large, barrel-chested dogs—namely dogs like sighthounds. The particular dog shown, though, is an akita(don’t worry, he is treated and survives)
Just in case, no, the owners of the dog were not aware of his condition at the time the video was taken: you can clearly hear their voices in the video expressing this. Thankfully they did realize it was serious in time to get him to the vet, where he was saved.
It’s very important to be able to recognize signs of bloat in real life. It’s one of the main killers of sighthounds, and is 95% fatal so please pass it on!