I have a part Siamese cat, at least 15 years old who has a habit of howling - unbelievably loudly-. Used to just do it at night, but now does it at all hours. Sometimes when she's alone and sometimes when you're in the room. Thought at first that it was loneliness or hunger but that doesn't seem to be the case. Could she be practicing to be a jungle cat? Anybody else have a howler and figured out what the problem is?