Why?
Colas, and some other sodas, contain caffeine, a stimulant cats are very sensitive to. All sodas contain lots of sugar or sweeteners, useless for a carnivore that can't taste sweetness, plus acids that irritate the stomach. The bubbles can also cause bloating. Even caffeine-free, a soda has nothing to offer a cat.
How much?
No amount is recommended. Don't leave glasses or open cans within reach: curious cats readily lap from drinks left on the table.
The risks
- Restlessness and racing heart with caffeinated sodas
- Vomiting and diarrhea
- Bloating from the bubbles
- Useless sugar, weight gain if it happens often
Your cat ate some: what now?
A few laps usually won't cause serious poisoning: watch your cat for 24 hours, especially for restlessness, vomiting or tremors. If your cat drank a fair amount, especially of a caffeinated or sugar-free soda, call your vet right away and keep the can or bottle handy.
Better options
Fresh water, changed every day. If your cat doesn't drink much, a fountain or wet food can help keep it hydrated.
Common questions
Can cats drink diet soda?
No. Diet soda is still acidic and fizzy, often caffeinated, and its sweeteners have no place in a cat's diet.
Can cats drink sparkling water?
Plain sparkling water isn't toxic, but the bubbles can be uncomfortable and most cats aren't interested. Plain still water is all your cat needs.
This information is general and does not replace advice from a veterinarian. If your cat has swallowed something toxic, call your vet or an animal poison control center right away, without waiting for symptoms.