Ironically, it's constipation that's normally the issue for Saoirse, Marje.
Update:
More whiffy, loose poops overnight and this morning. Only change yesterday was the food batch. Saoirse had eaten from this particular batch just before the diarrhoea started. I switched her to some of the emergency 'good batch' squirrel stock of pouches I hold in reserve for her for emergencies. Between the return to the 'good' pouches and the SEB the diarrhoea resolved and she was really well in herself. Now she's back to looking subdued and uncomfortable.

(For info, Lúnasa's poops have been a bit whiffy and a bit on the soft side when she has eaten food from this batch, too.)
I've only got a couple of 'good batch' pouches left.

In desperation at AMPS I tried her on another batch of the Sheba Fine Flakes that she hadn't got on quite as well to see whether it would be an option to tide her over till I can get a different new batch. She ate her brekkie but refused the food from this latest batch. I managed to get her to eat a little of an alternative food I hold in reserve for her (Kattovit Sensitive - this tends to nauseate her a little so I only give it to her in a crisis but she was mid-cycle and I had to get her to eat
something.)
The Sheba is the only food she can eat regularly and reliably. It could take a few weeks for a new batch to work its way through to the local supermarkets (and local pet shop can't get stock). I dread times like this. I wish there was other food that Saoirse could eat comfortably.
The only other thing that is different is Saoirse getting better BG numbers.
@Marje and Gracie - do you know whether moving to better BG numbers can irritate/inflame things in pancreatitis kitties? It's the only other potential cause of the diarrhoea that I can identify.
Shaking with anxiety again.

This is so tough. All things considered, Saoirse was absolutely
brilliant in herself for the period when the diarrhoea stopped and she was on the SEB. It is quite soul-destroying not to be able to keep her that way.
Mogs
.