Well,I do think about that and sometimes try to remember a particular slug and see if it has moved the next day (I suppose I should put a marker against it) but even if they are not quite dead I don't think they do any feeding and ,as I said the proof of the pudding is whether or not any damage is caused.

In the past ,before I used pellets one of my techniques was to leave the dead slugs in place in the hope that they would provide an attraction for other slugs(you know I suppose that slugs are cannibalistic)
I imagined the venue might grow in size exponentially but it never really seemed to work very well.

Another idea I have had is to destroy the slug "slime trails" since they follow each other and I thought that once I had cleared a particular area it might help to "rough up" the soil but I have never actually bothered with putting that into practice.