Thanks for the info!
To be fair, I won't call my cats picky. I can switch food very easily, from brand to brand, from dry-wet-raw without any "transition" period. Oddly though, there are food that they just refuse to eat from the very beginning. They sniff it for a minute and then look at me, with either confused or disappointed looking (can't tell). They wouldn't even try one bite. And maybe my cats are stubborn, once they made up their mind, time doesn't help to improve their attitute toward those food. So far I found Wellness and Max Cat are the only two they reject. I've always wondered why. The texture looks the same as other brands, and they certainly smell no different to me :/