I'll probably get a huge infestation after saying this but I've never had much bother with fleas, always had dogs in the house, the odd time they pick one up I just catch it and kill it the same as ticks, I've bought pups with a few friends on them and just did the same. Bought the odd thing of spray but nowt really. Mind putting a collar on one too try and stop ticks but he still got them on his arse end