Are dogs or cats better pets (Fotosearch | Getty Images)

I’m in the middle of a national book tour for “Your Cat: The Owner’s Manual.” This time last year, I toured for the companion book, “Your Dog: The Owner’s Manual.” I’m often asked if I’m a “dog person” or a “cat person,” and as a veterinarian, I have to say I haven’t any preference.

On our Almost Heaven Ranch in north Idaho, in fact, the score is dead even: four dogs, four cats.

Bing: Dogs and cats

But I don’t see cats and dogs as being the same. They need different things from me as a veterinarian, and they behave very differently from each other. For example, the tendency of cats to hide their illness is one reason why they don’t go to the veterinarian as often as they should; their unhappiness at leaving their home is another.

Just for fun, I decided to think about how dogs and cats differ in terms of a competition. If we had pet Olympics, would dogs take home the most gold, or would cats?

Video: What's your favorite thing about your pet?

Rate the Competitors
To determine which is the "better" pet, let's see how cats and dogs stack up in five categories: vision, smell, speed, endurance and intelligence.

Vision. Cats win this one. Both animals are predators, which means their visual acumen stresses movement over detail. Neither cats nor dogs are going to read the type on road signs, and their color vision isn’t as strong as ours, but a quick movement will get noticed even if it’s minor. But give the gold to the cats for their ability to see in far less light. When the mousies come out to play at dusk, the cats are ready for them. A twitch of a whisker or a tiny movement in the leaves can be seen in near-darkness.

Smell. Dogs even the score with their sense of smell. There’s a reason why you don’t see drug-sniffing cats, and it’s not just because cats aren’t exactly amenable to clocking in for a 9-to-5 shift at the police station. While cats have a better sense of smell than humans do — really, we’re pretty worthless in the nose department — the canine sense of smell is nothing short of astonishing. Most dogs have a face that’s really nothing but nose, and their ability to detect and distinguish odors is in the range of four times better than a cat’s.

Speed. Cats are natural sprinters, coiling and uncoiling their spines to blast off after prey or away from predators. For about the length of a suburban backyard, a cat can outrun and out jump a dog and can get over the fence before a dog can catch him. But that dash is going to take everything the cat has — he needs to rest after. Dogs such as Greyhounds can maintain speeds of 40 mph for a pretty good distance and can catch up to and pass a cat pretty quickly. Have to give this one to the dogs, by a nose.

Endurance. Dogs are natural marathoners, and a fit dog such as a working sled dog can cover ground at a trot for hours. The only endurance sport a cat would win is napping, since the overwhelming majority of the feline day planner is filled with a single notation: “Zzzzzzzzzz.” That’s not a dig on cats, though: When they need to hunt for food they don’t waste any time. They find, they kill, they eat … and they nap.

Intelligence. Cat lovers can argue very effectively that cats are smart enough to get people to feed and care for them with little more than purring in return. Measured that way, it’s hard to argue that dogs are smarter. But then you start listing all the jobs dogs have been trained to do, from smelling malignant tumors to taking down criminals, from finding and fetching birds to running an intricate agility course at top speed. And then there’s the matter of language recognition: Many dogs know more than 100 words, and a few know almost twice that many. Cats? If they know more than the words you use to call them for dinner, they’re not saying. Winner: dogs.