It doesn't take days for them to die, they don't even leave the area where the slug pellets are put .I've heard about frogs and birds being possible solutions but I don't have a pond and my next door neighbour has about a half dozen bird feeders in his back garden. Was hoping the close proximity would help.
Going to round them up tonight and dump them by a stream about a hundred yards from my house. Hopefully they don't find their way back.
I'd had enough the other day and was going to buy pellets but you have to remove the dead ones so their decaying bodies don't attract other slugs. And it takes days for them to die. Eff knows where the dead bodies would be.