Army of the Dead, the long-awaited post-apocalyptic heist movie from director Zack Snyder, has a simple premise: Las Vegas has been overrun by zombies and cordoned off behind massive corrugated steel walls, becoming a kingdom for the undead who are ruled by a handful of intelligent and incredibly dangerous “alpha zombies.”

A Japanese businessman (Hiroyuki Sanada) approaches a famed zombie killer (Dave Bautista) and tells him he’s got $200 million in a vault inside one of the now-inaccessible casinos. If Bautista and his team can fight their way in and get the money, half of it is theirs to keep.

The catch? They have a little more than a day until the US government plans to drop a low-yield tactical nuke on the city to wipe out the zombie plague.

Bautista and his crew hire a coyote (French actress Nora Arnezeder) to get them inside the city, and as they make their way toward the Las Vegas strip, they hear a blood-curdling roar. A four-legged figure approaches, obscured by dust, smoke and the ruins of abandoned cars, until it climbs on top of one of the vehicles and we see it properly for the first time — it’s a pissed-off zombified white tiger!

“Valentine,” Arnezeder says, turning to her huddled companions. “One of Siegfried and Roy’s.”

The zombie tiger, she explains, patrols the outskirts of the zombie “kingdom,” making a light snack of anyone who ventures too close.

Later in the movie there’s a scene in which the alpha zombie leader rallies all of his undead — including Valentine — and sends them en masse toward the hotel where the protagonists are trying to crack the safe and get at the piles of cash inside.

Snyder makes a great show of the endless zombie hordes thundering toward the hotel with Valentine among them, and it looks like the big cat is going to lead the charge until he stops, yawns and settles down on the hood of a car for a nap.

Is there anything more feline than that?

As it turns out, Snyder and his team were looking for a big cat expert to help them nail the tiger’s signature gait and physical tics as they created the CGI felid, and the consultant who agreed to provide them with feedback was none other than Big Cat Rescue’s Carole Baskin. As Variety notes, production on the movie began long before Baskin became a household name with the release of Netflix’s Tiger King documentary.

Although the inclusion of a zombie tiger was a fun surprise, my all-time favorite tiger from zombie fiction is The Walking Dead’s Shiva. She’s got a compelling backstory: The character Ezekiel was a zookeeper before the apocalypse and, realizing no one was tending to the animals as the world was collapsing, he risked his life to get back to the zoo and feed the trapped creatures.

When he got there, Shiva was so malnourished and hungry that her gratitude for Ezekiel’s intervention was obvious. Gambling that the powerful tigress — whom he’d taken care of for years — wasn’t going to hurt him, Ezekiel opened her enclosure to set her free. But rather than run off on her own, Shiva decided to stay with her human friend, and the two became inseparable as the world ended.

While Valentine was just another zombie, Shiva fought the undead, and she was badass. The show also earned praise from animal rights groups after opting for CGI instead of using a real tiger. The special effects team responsible for Shiva did such a fantastic job that viewers were convinced she was the real deal.