• Adele Danskin

Why Do Cats Wiggle Their Butts Before They Pounce?

Cats provide an endless source of entertainment for the people they live with. Not only do they warm our laps and soothe us with some serious purring, they offer us a unique front row seat to observe animal behaviour as it naturally happens.

Today, we’ll focus on an impossibly cute kitty behaviour: the pre-pounce butt wiggle. Yes, just preceding the seriousness and deadly accuracy of a hunting feline’s pounce is a little shaking of what their mamas gave them. And it’s not just house-cats, many big cats like lions, tigers, leopards, and jaguars sometimes engage in a little bit of getting down before striking out. But why?

As is the case with so many seemingly odd animal behaviours, theories abound, but the truth behind them is known only to cats, and they’re in no hurry to, well, let themselves out of the proverbial bag. Some veterinarians believe that the butt wiggle is a physical preparation that ensures a successful pounce—and in turn, a needed meal.

“Basically, when cats pounce, they need to propel themselves using both hind limbs for full takeoff. Usually when cats walk, they alternate their back legs, but when jumping or pouncing they use both together,” says Dr. Katie Grzyb, DVM.

Cats might also be wiggling to test the strength of the ground before they leap. If a cat leaps from loose or rocky ground, the results can range from comical to dangerous. A few tentative steps to give themselves some purchase in the soil can make or break a successful leap.

“When a cat wants to pounce on something, they wiggle their hind ends back and forth to check their balance. It helps them determine if they have solid ground under their hind legs to pounce and also helps them determine if they will make the jump distance safely. I haven't seen much evidence of wild cats doing this, but it is reported that it may be an innate behaviour, so I am guessing that it occurs—just at a much lesser degree than in house cats,” says Grzyb

Is the Wiggle instinctive or Learned?

Animal experts are unsure whether this is a learned or innate behaviour, but most factors seem to point to a little bit of both. While it seems innocent, kitten and cat play is an extension of the hunt—and a constant source of training for real world activities.

“When kittens play, they’re learning and honing their skills, Not only are they getting practice, but it tones their muscles.”

We do our fair share of wiggling as well. Baseball players, golfers, and sprinters routinely shake out their muscles before they begin; warm-up exercises are a critical part of working out or playing a sport. All of this business might just be the human version of the kitty butt-wiggle.

“I really think the behaviour is pretty simple. One purpose is flexing, getting those muscles warmed up and helping to focus and hone in on their prey. There’s also probably a little excitement or nervous energy at work there too,”

So, in the immortal words of Oscar Hammerstein—fish got to swim, birds got to fly, and cats … well, they’ve got to wiggle!

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