Cairo had his barium swallow today. Two xrays; no megaoesophagus. So I suppose we rule that out, but thanks everyone for your thoughts. It was like the electric toaster that is on the blink… Cairo ate his food without incident when being checked out! LOL. Vet thinks the barium might have lined the stomach, so he could tolerate food better - this pointing to an irritated stomach lining or perhaps an unseeable ulcer (treatable by antibiotics thanks to the two Ozzie Perth doctors who won the nobel prize in medicine). So we came away poorer, but happier, complete with zantac to treat the reflux (wish the cheaper option had of been considered first but that's the way it goes...). So now its a wait and see game, still trying the hand feeding to see if we can get food lower in the stomach and not cause irritation.
He really seems to like egg and milk at the moment, and I found feeding him this first helped him keep food down and eat without screaming. That's one high pitched scream...eh? BW, Darren