Have you tried FRONTLINE drops? Just a squeeze of a few drops on the dog's shoulders and will repel fleas for months. Meanwhile, sun all your linen, mop and wipe all floors with an antiseptic wash and all rugs and carpets rolled up. If your whole house is carpetted, you will have to vacuum the it thoroughly and administer a flea spray all over. We use FRONTLINE and swear by it whether with fleas, mites or ticks. Haven't seen them for eons. (touchwood)