Just some fun facts or Superstions

A howling dog at night means bad luck or somebody close to you will be very sick or worse.

In Scotland, a strange dog coming to the house means a new friendship; in England, to meet a spotted or black and white dog on your way to a business appointment is lucky. Three white dogs seen together are considered lucky in some areas; black dogs are generally considered unlucky, especially if they cross a traveller's path or follow someone and refuse to be driven away. Fishermen traditionally regard dogs as unlucky and will not take one out in a boat, or mention the word 'dog' whilst at sea.
Source: Vanessa's Pagan Place Folklore Page