They show dogs as they enter a house in the movie, that's the only time dogs are visibly seen, and heard barking and excitedly whining. Later in the movie, you hear howling from dogs / wolves as well during a night scene.
Yes! The entire movie is filmed by the actors with handheld cameras, so when they're scared or running, the camera shaking is horrible. We weren't even able to make it to halfway point because it gave us all a massive headache to the whiplash.