I had several pigs with heart issues over all the years, with various symptoms. They all had one thing in common, which was a bobbing motion when they sat still. I have an example of this on vid, with a very visible bobbing, although it's usually less obvious. Binky already had a severe heart condition when he arrived here, hence why you can see it well. He also has other symptoms, in this case a pounding heart after a minimal physical strain for example, when being picked up. But you can see the entire body gently bob back and forth. This was taken before his first heart meds.