Thanks for your replies.
Well, dear old Dad has blood poisoning as well as whatever else they have yet to diagnose ( still confident it's pancreatitis, but thinking it's also gall stones and possibly something else).
He's not in a good way. He's very distant, had a temp of 41 degrees this morning with a low of 39.5 this arvo, had 8 drips in 14 hours, has had numerous tests... ultrasounds, xrays and a CT scan.
They haven't given us any definites yet. They want to keep him in for at least a week.
He's now having all liquids scrutinized (input and output).
He doesn't eat a high fat diet at all... he eats a brilliant diet and is very fit and only 49, so I think it's shocked everyone a bit. I'm yet to feel the affects of shock... Not feeling anything at the moment.
Hoping he starts improving soon, as he's gone downhill from last night.

Thanks for your replies. I'll let you know how he gets on.
xx