Zombie Disposal Unit

Someone has converted a Japanese mini-truck into a "paddy-wagon" for zombies:

Having recently transformed a Japanese mini-truck into a zombie disposal unit — complete with emergency kit, tracking console and syringes with zombie anti-venom — Gusz has everything he needs to deal with an impending zombie apocalypse.

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A six by four foot cage or “zombie containment enclosure” made of reinforced steel is built on the back of an old Suzuki mini-truck. He said the enclosure can contain up to eight hungry zombies, but most of the time the truck will only carry three.

Equipped with a catch pole on the side of the cage, a Gatling gun mounted to the roof and a shotgun on the dash, the truck is prepared for the worst. And when the outbreak becomes too widespread to catch and control the zombie population, the truck is outfitted with what Gusz calls a decapitating front bumper, letting him drive through the roving hordes to safety.

There is a picture of the owner and the truck at this link.

I want to know what he thinks would work as zombie anti-venom. Also, the Gatling gun would need to be fired from someone in the cage ... meaning it could be fired by the zombies. Oh well, a good advertising gimmick.