R.I.P. Fleas Extra is indicated for indoor use only. The product was not specifically designed for outdoor use and therefore Dechra cannot guarantee efficacy for a full 12 month period when the product is used outside or in hutches / kennels / chicken houses. It is important that all bedding / straw is removed prior to spraying. Ventilate for at least 1 hour, and ensure that all spray mist has settled and surfaces are dry before allowing animals to re-enter.