Taste, Toxins, and Everyday Dangers

Cats have excellent senses of sight, hearing, and smell. But when it comes to taste, we finally beat them—slightly.

Cats can detect sour, bitter, salty, and sweet. But their sweet sensitivity is weak. For a long time, experts said cats couldn't taste sweetness at all. One said flatly: "Cats have no sense of sweetness." Another declared: "Cats cannot distinguish sweet flavors." That's no longer considered true. New tests show cats do respond to sweetness. If you dilute milk to a quarter strength and offer a hungry cat two bowls—one with sugar, one without—the cat consistently prefers the sweet one.

So why did experts deny it for so long? Because in most experiments, cats ignored sweetness. Their reaction to milk itself was so strong that the sugar didn't matter. Only when the milk was heavily diluted did the sweet preference show up. So cats like sweet things—just not very much.

Their strongest taste response is to sour, then bitter, then salty, then sweet. When food touches the tongue, it contacts taste buds on the tip, sides, and back of the tongue. The middle of the tongue has no taste buds at all. That rough, spiky area is for scraping meat off bones and grooming fur, not for tasting.

But smell matters more than taste to a cat. When a cat approaches food, smell is the most important information. That's why many cats sniff a meal and walk away without even tasting it. Like a wine expert who only needs to smell the wine, a cat can learn everything it needs from scent.

If a cat does taste the food, temperature matters too. Cats prefer food at about 30°C—the temperature of a fresh kill. Food straight from the fridge is hated unless the cat is starving. Unfortunately, most modern cats have learned to accept cold "fast food."

Now, toxins. Cats are small, curious, and groom themselves constantly. That combination makes them vulnerable to everyday chemicals.

The biggest dangers are disinfectants and insecticides. We use them to clean our world, but they contaminate the cat's world. This applies indoors and outdoors. Rat poison is a special danger. Many people use it without thinking. The poison slows the rodent down, making it easy prey for a cat. The dying mouse still contains the poison. A cat that eats it may vomit, foam at the mouth, stagger, have a racing or weak heartbeat, breathe heavily, seize, bleed internally, and die.

Household powders and sprays are another risk. If a cat lies on a herbicide-treated lawn and then grooms itself, it ingests the chemicals. Indoors, floor cleaners, disinfectants, and furniture sprays can get on the cat's fur. The cat licks them off. Small doses may be harmless, but in a home obsessed with cleanliness, the risk adds up.

We also make the mistake of thinking that what's safe for us is safe for cats. Some painkillers that are mild for humans—like aspirin—can be dangerous for cats. If you treat your cat like a small human and give it human medicine, you may hurt it. When your cat is sick, ask a vet.

Alcohol is another problem. At parties, someone may think it's funny to put a little alcohol in the cat's milk. Most cats refuse. But if they drink it, they get sick fast. Humans can process alcohol; cats can't. Even a small amount can cause vomiting, collapse, or coma. House cats are better off sober.

Toads are a natural hazard. A young cat in a garden may find a toad irresistible. Toads are slow, clumsy, and easy to catch. But toads have a secret weapon: bufotalin. It's a toxin stored in the warts on their skin. The warts only release the poison when the toad is hurt. If a cat bites a toad, the poison leaks into its mouth. The cat's mouth becomes red and swollen. It drools and retches. Most cats learn after one bad experience. But a cat that bites deeply can be seriously hurt. Twenty milligrams of the toxin can kill a dog. Cats are also at risk. This may be the origin of the saying "curiosity killed the cat."

Finally, antifreeze. It tastes sweet and smells appealing to cats. If a cat licks a puddle of antifreeze in a garage, the ethylene glycol can cause irreversible kidney damage and coma. The puddles often form under cars, where cats like to hide. It's a hidden killer. When a beloved pet gets sick, we think of disease and infection. Sometimes the real cause is chemical poisoning.