PURINA TOTAL CARE Flea Powder kills fleas using natural pyrethrins. Apply at weekly intervals or whenever fleas are visible on your pet. Lightly sprinkle onto the coat and brush in against the fur. Smooth back the fur with a damp cloth. To ensure the best results it is important that your dog’s environment is also treated as your dog can continually be reinfected from an untreated environment. To ensure maximum flea control: – Treat other pets – Treat the carpets & dog bedding – Vacuum carpets regularly and discard of debris.