We have had the same problem - I cannot stand them! I don't think they like the smell of cat poo, male pee or household products. If you can find where they are in your garden (Do they have a den? Do they jump over or climb under a fence?) then maybe throw your cat's poo or a bleaced cloth in the area, paint the fence...or get your husband to pee on the fence? I know the latter may sound a bit different, but it seemed to work for us. Generally make as much noise and disturbance in the garden as possible so they get the hint that humans are around.