Thanks Tosca, was feeling horribly guilty for storing such things within her reach. Never occurred to me that she'd be attracted to the bait. Should have known really, anything nasty and smelly, and she's in there!
Anyway this morning, all is well. She had hiccups after her breakfast, but apart from that it's business as usual. She's an RSPCA staffie 'mix-up', so luckily has a cast iron constitution.
Those palatable tabs should come with a warning? Or vets should be very clear that they must only be dispensed in bottles and not polythene pouches? They are just like dog treats, but lethal in the quantity she ate.