Call of Duty: Modern Warfare 3 is live with a new large-scale Zombies experience, featuring many familiar enemy types from old Zombies games. One little Easter egg allows you to pet the hellhounds in the mode and doing so will score you an achievement. Here we'll guide you through the steps to unlock the You Can Pet The Dog achievement for Modern Warfare 3.

Get the zombie flesh

　　Now that you've acquired the zombie meat, you'll need to find a dog to feed.

Find a hellhound

　　The icon is a dog house logo with a hellhound face as shown in the image above

　　You'll want to clear out all the nearby zombies before approaching the dog house. Then, interact with the dog house. It will have inventory spaces like a backpack, so you can transfer the Chunk of Flesh item into the dog house.

　　Once you back out of the dog house's inventory, the house should explode and spawn a hellhound. This is a good doggo, and you can interact with them (X/A) to give them a pet. Doing so will also unlock Modern Warfare 3's You Can Pet The Dog achievement. Everyone in your party should be able to pet the dog, but sometimes the dog gets bugged and won't sit still for everyone to interact.

　　For more on Modern Warfare 3 Zombies, make sure to check out our guide on how weapon loadouts work. Here you can find all the field upgrades in Zombies, including the best picks for your matches.

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