What was the strange experience of sir Henry Watson and Watson at the moor?

Both men heard terrifying sounds on the moor. Watson almost believed the foggy moor and the scary sounds proved the existence of the hound. Though the diary acknowledges that such a belief strains his rationality, he also admits the "facts" of the howling, and acknowledge the difficulties posed even if there were an actual hound . For instance, the hound would need to be fed.