Specific Cat FCD - Crystal Management

My cat used to vomit these up regularly, but since he tends to binge eat, we thought that was the reason. We've had a second cat for a few months now (who doesn’t have any eating issues) and it’s the same story. Lots of vomiting. They’re both small cats, so maybe the kibble is a bit too big, I’m not sure, but I’m going to try other brands.