Bungalows or buildings, bungalows may have viruses at home, and houses that usually have dogs and die will die if they raise dogs again within six months. Especially canine distemper and other diseases. The building may have been improperly fed by you, or your neighbor's sick pet infected you.
It is also possible that the biggest taboo for puppies is eating indiscriminately.
Finally, I tell you, don't believe in superstition, believe in science.