Best Cat Food for Picky Cats

My 7 year old cat is beyond picky to the point of losing substantial weight. We have taken her to the vet in fear of an illness but she checks out perfectly fine just an extremely picky food eater.
We tried tons of brands from vet recommended high end brands to cheap canned food and nothing worked.
Until we found Iams Proactive Kitten food!
She finally dives into her bowl and is now putting on some of the weight she has lost. The small bites are great to as she doesnt have to work so hard for her meal.
This brand probably saved my cats life so thank you IAMS!!