This is the ingredients list:
Chicken Meal (40%), Freshly Prepared Chicken (17%), Sweet Potato (14.5%), Chicken Fat (10%), Chicken Digest (3%), Cellulose, Peas, Beet Pulp, Brewers Yeast, Dried Egg, Salmon Oil (1%), Minerals, Dried Carrot, Seaweed Meal, Prebiotic MOS, Prebiotic FOS, Yucca Extract, Rosemary Extract, Thyme, Fennel, Peppermint, Dried Cranberry, Citrus Extract.
I'm working on the assumption that the herbs are basically there to justify the high price tag. But, whilst it does contain legumes, they're less than 3% (because chicken digest is 3% and they're lower down the list).
Would that be enough to cause cardiac issues?
The stinkyness has entirely resolved since stopping the whiskas so my working assumption is it was that. Certainly now they're on the kibble alone they're much better. But they're clearly missing the wet food, hence seeking suggestions of something they might enjoy and which would give variety.