Cat and dog are both treated with Frontline. We seem to have had a flea 'problem' (ie, me being bitten, finding the odd one) for quite a while - before the dog came to live with us, so I'm tempted to blame the cat! I'm now finding a flea somewhere every evening - on me sitting on the sofa, on the dog, on my foot walking up the stairs. Have sprayed the house with JOhnsons pink can of extra strength spray (Pets at Home said it was the strongest they do), and STILL I'm finding the bldy things. I can only think they are well and truly in the carpets, sofa etc etc. Any tips?