Zombicide Season 2
(I'd wanted to call it "Electric Boogaloo," but was shouted down) updated their Kickstarter (actually, they've been doing that a lot, with all the stretch goals they've been busting), but anyway, they've added in the rules for dogs to the game and posted up the rules. Go check 'em out.
From the update:
Get 6 companion dogs free! 3 great sculpts of man's best friend (you'll get 2 each), who'll do all kinds of stuff for your beleaguered Survivors. One of the most requested items from our first Kickstarter... we've kept these canine cuddlies under wraps until now!