Where does the howling dog superstition originate?

a friend

told me it was good luckk

to see a dog walk on its hind legs,,

but i not sure whether it is or isn't

Some people believe that a howling dog is a sign of death. This superstition has some truth in it. Dogs, with their good sense of smell, can often tell when an animal or man has died. When a dog howls, he may actually be smelling death. But this doesn't mean he can smell death before it happens.