A Swedish Zoo Wanted to Prove Wolves Could Be “Friendly.” Then the Experiment Went Horribly Wrong.

A video of the terrifying moment a wolf attacks a zookeeper at one of Sweden's biggest animal parks, 30 years ago, has brought back the tragic story of how humans and wild, dangerous animals need to keep their distances.

At Sweden’s Kolmården Zoo, visitors were invited to do something almost unthinkable: step inside a wolf enclosure and come face-to-face with a pack of wolves. No fences between you. No glass. Just humans and predators, sharing space.

The goal? To show the public that wolves aren’t monsters. That they can be gentle. Curious. Even friendly.

For a while, it worked. People lined up. The experience became wildly popular. Photos were taken. Smiles everywhere. It felt like proof that humans and wolves could coexist—closely.

But behind the scenes, things were already unraveling.

To make the wolves “safe,” Kolmården socialized them from birth. Employees bottle-fed the pups, brought them home, raised them like dogs. At first, staff were eager. Around 30 employees signed up to work inside the enclosure as guides, many with little to no prior experience with wolves.

And at first, the wolves were young. Cute. Manageable.

Then they grew up.

By 2012, only about five employees were still able—or willing—to enter the enclosure. The rest had been chased out, injured, or quietly removed after terrifying encounters. The wolves weren’t playful anymore. They were testing boundaries. Pushing limits. Acting like wolves.

The pack itself was unstable from the start. Known as the Farkas Flock, it consisted of nine male wolves, all close in age. In the wild, this almost never happens. Male wolves would naturally disperse as they mature. Here, they were trapped together, stressed, aggressive, and constantly competing for dominance.

They even had symbolic names—all meaning “wolf” in different languages. Farkas. Úlfur. Vilkas. Amaroq. Ookami. Volk. Lobo. Tchono. And Kurt.

Kurt would be the first to die.

As early as 2010, warning signs were impossible to ignore. A 15-year-old girl was bitten on the leg. Another wolf grabbed a 10-year-old girl’s jacket and refused to let go. These incidents were brushed off as “playful behavior.”

Then things escalated.

That same year, during a guided tour, the wolves began circling a woman. She was deaf, and the park later claimed she didn’t follow instructions. Video evidence showed the opposite—she stood perfectly still, exactly as she was told. Still, the wolves closed in. After 15 minutes, staff managed to get everyone out. The woman survived, but she left with bite marks on her leg.

Wolves are incredibly sensitive to weakness, difference, and hesitation. If one wolf initiates behavior, the rest follow. What looks like curiosity can become a coordinated attack in seconds.

Employees were being chased out of the enclosure, sometimes for good. One woman needed stitches after a deep arm wound. Another stopped entering the enclosure entirely. Yet the working culture didn’t change. There were no spotters. No alarms. No specialized training. It was “learn by doing.” Figure it out. Earn the wolves’ respect.

One employee thought wearing her own clothes instead of a uniform might help. She entered alone. Almost immediately, a wolf grabbed her hoodie and pulled her to the ground. The pack circled. She kicked one wolf in the head. Some sudden noise distracted them long enough for her to escape.

That wolf was Kurt. He was euthanized afterward.

Still, the project continued.

By then, of the original 22 guides, only five remained. The wolves had effectively decided who was allowed to be there.

And then came June 17, 2012.

That morning, 30-year-old Karolina—a guide and animal keeper—entered the enclosure alone. This wasn’t unusual. She had raised these wolves from puppies. Bottle-fed them. Worked with them for years.

It was raining. Windy. The park was quiet. Karolina felt a bit unwell—possibly dizzy. She was wearing a raincoat and rain pants, which was unusual for her.

At 9 a.m., she was seen alive for the last time.

An hour later, a colleague noticed she hadn’t returned. Her radio was outside the enclosure. There was no daily log entry. The enclosure door wasn’t locked.

A pregnant coworker hesitated before entering. She’d been bitten before. She already felt uneasy around the wolves. Inside, she noticed something chilling: Vilkas—a low-ranking wolf usually kept away from the others—was standing with the rest of the pack.

At 10:15 a.m., Karolina’s body was found.

She had been killed by the wolves.

No one knows exactly what triggered the attack. There were no witnesses. Maybe she stumbled. Maybe she smelled different. Maybe she corrected the wrong wolf at the wrong moment. With eight fully grown male wolves, it only takes seconds.

After her death, the “close contact with wolves” project ended immediately. Staff were banned from entering the enclosure. The experiment was over.

Kolmården wanted to prove wolves could be friendly. What they proved instead is something far older, harsher, and easier to forget: wild animals are not pets, no matter how lovingly you raise them—and nature does not bend to good intentions.