IAMS Advanced Nutrition Senior Cat 11+ with Chicken - cat dry food

Until recently, they used to eat the senior kibble with gusto, but unfortunately with the last bag they don’t want to eat it anymore and are vomiting much more. One of my four cats refuses to eat it at all, not even with a bit of wet food mixed in, which still works for the others. I also find the kibble too big for seniors, unfortunately, so I’m now looking for a different brand!