The terms "filial dog" and "prosperity dog" refer to distinct appearances and associated meanings. A "filial dog" is characterized by white markings on its head, paws, and tail tip. Some folklore suggests that keeping a "filial dog" may bring misfortune to a household. Conversely, a "prosperity dog", such as those with a curled "money tail" or "four-eyed dogs" (dogs with markings resembling eyes above their eyes), often display white markings on their chest. These dogs are believed to bring wealth and good fortune to their owners.

The concept of the "filial dog", sometimes referred to as a "mourning dog", is a common belief, particularly in rural areas and among dog owners. This term refers to dogs with white fur on their head, limbs, or tail tip, excluding those that are entirely white. "Filial dogs" are often met with prejudice and abandonment due to the superstition that they bring bad luck and negatively impact family members. This belief has led to the misconception that they are unlucky, disrupt the home's feng shui, and require interventions to correct the perceived misfortune. However, there is no scientific basis for this superstition. We should not judge dogs based solely on their markings; they simply have a diverse coat pattern. A "filial dog" is not a symbol of misfortune, and there is no reason to fear keeping one as a pet. We need to be rational and treat each dog fairly.
"Prosperity dogs" are associated with wealth and good fortune. Typically, these dogs have a white patch on their chest, believed to have the power to ward off evil spirits and bring wealth to their owners. Dogs with curled tails, known as "money tails", are also considered lucky. This category also includes "four-eyed dogs" and dogs with four white paws and yellow fur, which are believed to bring financial prosperity to the household.