First of all, the dog is one of the five animals, and the five elements belong to the earth. The five animals represent right and wrong in geomantic omen, so having dog blood at home is a bad sign, which may cause family quarrels and contradictions.
Secondly, dog blood also represents fortune in Feng Shui. If there is dog blood at home, it may destroy the fortune and lead to a decline in fortune.
Finally, dog blood also represents health in Feng Shui. If there is dog blood at home, it may affect your health and lead to illness.
Therefore, from the perspective of geomantic omen, it is unlucky to have dog blood at home. We should take timely measures to resolve it, such as keeping the room clean and avoiding keeping pets at home.