It is important to keep animals out of the room when using a home flea spray. After spraying, ventilate the room as well as you can by opening windows. Keep dogs out for at least 4 hours, or until the spray is thoroughly dry. Cats must be kept out for 24 hours. Do not spray any pet bedding unless the product specifically says it is safe to do so, but wash it in the machine at over 40 degrees instead.  This will kill any fleas, eggs and larvae in the bedding.