I don't get many slugs in my garden- but that's because I have the local frog population resident in four small wildlife ponds. Free and organic! I did tread on one barefoot when I ran outside to speak to a cab driver- I screamed horribly and he thought I'd really hurt myself! That horrible feeling of resistance then sudden give. Ewwww
Please a thousand times please do not use slug repellents, granuals. Hedgehogs die in agony from ingesting them. Once, when our ds was about 8, he was distraught that we could not save a HH from this. He had noticed it in a neighbour's garden as it was giving out a pitiful cry. It was so much more traumatic than squishing a slug with your bare feet. Please chose your slug repellent method with the utmost care.