Some cats eat so fast they swallow air and whole kibble, then bring up tubes of food soon after; slow devices insert physical obstacles that force pacing.
Slow bowls, snuffle mats, and food balls share the idea and add foraging enrichment, an extra mental-health benefit for indoor cats.
Competition anxiety in multi-cat homes also drives gulping, so a slow bowl treats the symptom while feeding separately removes the cause; combine both.
If vomiting continues after slowing meals, or weight drops, it is not just speed; get the esophagus and gut checked by a vet.
