I think I just witness my first time with Bloat.
I was at the Dog Park this evening. A man just arrived with his young boxer. As soon as he came into the park, his dog fell over. I was at the top of the hill when this happened. So I rushed over to see if I can tell what might be happening. The dog was tightening up her stomach, gagging, and foaming. I opened her mouth to see if there was any blockage (visable) ... didn't see any.
So I told the man to bring her immediately to the Emergency Vet. I hope he made it on time.
Does that sound like Bloat to you?