He is still doing the 'sitting on our feet' but has let wind a few times which seems to provide momentary relief. He is not vomiting or coughing. His last 'poo' of his walk about 3pm was sloppy but the first 2 were normal for him. We live near a beach so I suspect he has eaten something!
No vomiting. His abdomen feels very 'hard' to the touch. He weighs about 34kg. He's a big foxhound!