Royal Canin Instinctive 7+ in Gravy

My cat has had the Royal Canin for nearly 9 years, in the past 2 years I opted for the 7+ but she now won’t touch it, the actual content doesn’t look quite as bright and sharp looking so maybe the recipe has changed, I’ve just donated 2 boxes to a local food bank, maybe that’s why there was such a good discount this month, that doesn’t happen often. I went back to the regular adult instinctive and she is once again leaving an empty bowl.