Hi there, Two weeks ago I treated my dog with 'Beaphar' dog flea and tick drops, it doesnt appear to have been very effective, she is still scratching madly and I have found 6 or 7 live fleas in my house, I want to treat her again with Frontline, when will it be safe for my to do this, I dont want to make her ill, but the thought of these horrible little creatures in my house is making me ill! Thanks! headbang