
Make the bowl harder to tip
Use a heavier, wider bowl or a stable fountain. Put it where elbows, feet, and pets are less likely to bump it.
Updated
Water bowl
A cat may knock over water because the bowl moves, the location is poor, the water is stale, or splashing became a game.
Fix the physical setup first, then watch whether drinking or urine has changed. A messy habit is different from a new thirst pattern.

Use a heavier, wider bowl or a stable fountain. Put it where elbows, feet, and pets are less likely to bump it.

Some cats reject bowls near litter, food, noise, or traffic. Refresh water often and try another quiet location.

If your cat is playing and drinking normally, a washable mat can protect the floor while you adjust the station.

New bowl knocking with much more drinking, larger urine clumps, weight loss, vomiting, or weakness belongs in a vet call.
Use water gear that is stable, cleanable, and easy to monitor.
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Use a heavier wider bowl or stable fountain, move it to a quieter place, and add a washable mat while you test the setup.
Call your veterinarian if it is new and comes with increased thirst, larger urine clumps, weight loss, vomiting, weakness, or appetite changes.