My 8 week old pup howls as a symptom of separation anxiety - he begins whimpering when I leave and within five minutes works his way up to a full-blown howl. It's very melancholy...
But sort of cute too, because it reminds me of Lady from
Lady and the Tramp during her first night home.
I'm in the process of nipping it in the bud right now while he's still really young through positive training when he's quiet, because I live in an apartment complex and that behavior isn't gonna fly when he gets older...