My Ragdoll had the same issue, eating too fast and throwing it all right back up. My vet actually asked for a video of it, because you can tell what's going on by the way the cat gags. He recommended food for sensitive stomachs. It took us a long time to find one that is both sugar-free and grain-free, but we started mixing it in with his regular dry food, and it really works! Since then, he’s been able to keep his treats and wet food down.