My Lab always knew when it was dinner time. At five minutes to 5, she stopped whatever she was doing and gave me the stare down. If I didn't respond, she was more persistent by hitting me with her paw or barking once to get my attention.
Jessi, Have you known a more verbal dog than the Jack Russell? Misha talks all the time. I have never had a dog that had so much to say. It isn't just barking. She will sit in front of you and give out all sorts of yeowls, whines, barks, and other noise. It sounds like yours has the same qualities. They sure seem to be happy to be fed.
Misha also does the "air" jumps. As I am getting the food, she sits and then she jumps straight up in the air. I'm not sure if it's because she is excited or she thinks I've forgotten her. LOL I've turned it into a trick. If I say "Jump for Joy", she will jump up about 4 feet in the air.