We cannon guarantee that no dogs, cats or other animals have ever been in a holiday home, in which pets are not allowed, as the owner of the house could have a dog or cat of his own. During the early and late season especially, the holiday home may have been vacant for a long period, which can result in a more humid and earthy climate than you are use to at home. This will, however, disappear after about a day of heating/airing out.