Sometimes when I find DD is not totally interested in eating, I hear her make sounds like she is chewing rubber as she is sucking,,, now is she actually sucking for food or doing something else and not eating? Usually the sound she makes when she eats and I know she is getting plenty of milk and is guzzling is kind of like a wet kiss sound with each suck, or like a clicking /kiss sound. What is she doing when she makes the gummy chewing rubber noises?