Thanks everyone - just noticed the newer posts.

We saw a locum vet once, a very young woman, who mentioned megacolon but at the time following discussion with family we thought she must have been a newly qualified vet who was a bit over-enthusiastic. Maybe thinking vets are young is a sign I'm getting old!!

I'm going to up the lactulose gradually since Jack's dose is a fair bit more than Iggi's currently on. I think that will help him so I'll see how it goes.

I'll keep a close eye on him and if things happen again then I'll ask the vet about megacolon.

He's going along quite well now, not straining but the occasional 'incident' outside the litter-tray.

Thanks again.