What can I do? I use the Broadline combined de-flea and worming drops once a month on his neck, but every time I comb him, (every day) I find live wrigglers. He is ginger and the fleas are usually black. Next door have two black cats, plus one who went feral from their house but still visits our gardens.
The DC have now been bitten! Ugh. I've boil washed everything I can, and hoovered and sprayed the carpets and soft furnishings. Don't dare spray mattresses as it may not be good for DC. What else can I do?