Vulcan is the God of Fire in Roman Mythology, and the name conjures up amazing imagery of strength and flame and iron will. It makes us think of war and a battle. Seems fitting since his ancestors are the likes of Man O War and War Admiral.
We hear this statement and that term often in the horse world. You hear is much less often in cats and dogs. Generally, in companion animals, we connect weight loss with either too little food or a health concern.