After reading your response, I needed to indicate that Charlie is panting and his heart also feels as if it is racing often. We lost my mother a few months ago, and he does live with my father. However, we wonder if any of his symptoms may also be stress related. He rarely barks and he doesn't make any sounds that are indicative of pain. He is such a sweet anf gentle dog, but we do not want him to suffer.
Thank you. . .I appreciate your advice.
We will get Charlie to his vet tomorrow for an evaluation.