My, kaycee is eight he barks at the tv also,birds,cats, any animal and also at himself on my cumputer,he also knows the music of commercials with animals on them and will come running from any where in the house,
when he was a pup i put his food bowl under the tv stand. im not sure but i think he does this to protect his food, but i really think he is so smart because he actually watches tv programs with me. he has never stopped doing this.
He never barks until he sees them on tv, or if he hears someone at the door.