Why does my dog push his food bowl around the floor

As a bowl empties, remaining kibble can slide to one side when nudged, and a determined dog will keep pushing the bowl to chase it rather than giving up, which is more about persistence than any problem with the bowl itself.

A light plastic bowl on a smooth tile or laminate floor slides far more easily than a heavier ceramic or metal one on a textured surface, so the same dog can seem far less prone to pushing a bowl once the bowl and floor combination changes.

A non slip mat under the bowl, or a slightly heavier bowl material, usually stops the sliding that triggers the chasing behavior in the first place, without needing to change anything about how or what the dog is fed.

Placing a heavier bowl on the same floor for a few meals, without adding a mat, is a useful way to isolate whether weight alone is enough or whether the floor surface itself is contributing significantly, since some very smooth floors, such as polished tile, can still allow a surprisingly heavy bowl to slide under a determined enough push, in which case a non slip mat becomes the more reliable solution regardless of the bowl's weight. Combining both a heavier bowl and a non slip mat together gives the most reliable result for a floor and dog combination that resists a single fix on its own.