Spoiler (click to show/hide):
Deciding to just go ahead and drop the addiction system, I'll let you roleplay things out instead.
Roll-19
You set many of them aflame, the zombies, male ones at least, not having enough sense to not wander into your flamethrowers arc. And while you don't get the cat, who leaps back before the first bit of flame can lick at it's body, the dogs all go down, even as Leslie turns... and begins firing, signalling the mutant redskinned monsters had decided to take advantage of things.
As it just so happens though, there is an open store nearby that you can sneak into if your quick enough!