The owner should live in the yard, which is very common in rural areas, because the duck has amnesia and went to the wrong house to find a new owner. In fact, there is no such thing as feng shui not feng shui. Personally, it is a good thing for ducks to come to your house. From the side, there is something in your home that attracts it. Otherwise, why doesn't it go to other people's homes? It may bring some wealth to your family.
Many things, we should look on the bright side, and don't trust Feng Shui easily. In today's society, we should trust science.