Send the company’s chemists and controllers packing or make them eat the feed themselves...
After the "recipe" was changed, the food started to smell very chemical and our Ridgeback bitch got diarrhoea.
To help her recover (and because she sometimes gets Rinti Singlefleisch from the can anyway), we gave her that, and a week later we tried Concept for Life again... with "overwhelming" results, meaning she immediately went back to wet food.
It's a real shame that we won't be buying this food anymore – especially since we had been feeding it to our previous Ridgeback bitch for many years.