My dog really enjoys watching televison, especially when other dogs, or horses or cows are in the show.
My current dog does too. He pays no attention to the TV unless there is a dog. He seems to notice the dog, even if the dog is quiet. He really gets excited if the dog barks, and he runs over to look behind the set to see if he can find the animal.
This morning he became very interested because there were howling wolves on a commercial. This particular dog is totally quiet himself -- never barks, howls, or whines (although he can). But he lifts his head right up as if he understands the language when a dog or a wolf is vocalizing on TV.