Never mind about dogs. My great grandfather, on seeing a wireless set for the first time, went round the back of it to see where the voices were coming from.
And yes, dogs can and do. Mine have the TV on when I'm out (must take the remote off them). They are most interested in watching a programme when it has the sound of a puppy, or a dog in distress or very angry. There should be a warning: "This programme contains scenes which some dogs may find distressing, and some adult barks"