Treating flea infestations in case of fleas without pets often ends up being a lot tougher since the identification of fleas goes unnoticed for a while. During this period, the fleas can multiply very rapidly. Additionally, if the fleas without pets infestations are occurring due to your neighbors dog or cat, then simply treating your home once or twice might not be sufficient: the fleas are simply going to come back and hide in cracks, crevices and other hiding places in your home.