
Hi Miranda,
TBH I can't see that (from a quick google!) that anything in JWB pouches would set off this behaviour - dogs don't need carbs and certainly ND is a higher source of meat content than many other brands but even so I don't see the connection

ND is a good food and it may be worth changing over just to see if it makes a difference - even if only to satisfy your behaviourist that your open to suggestions LOL.
I'd be inclined to wonder if there is something happening within your dogs earshot at around 3-00am which is waking her? The CH boiler kicking in, one (or more) of the local fox population wandering around, etc? I know around my garden there are lots of goings on at this time (dogs sleep well enough but I'm an insomniac!) so perhaps this has happened recently and even if not ongoing has changed your girl's bodyclock and become a habit for her now.
HTH,
regards Teri