Hi Chico_W
You are right, some slugs are a good thing. There are loads of different types. some help to clear up the garden waste and break it down, some eat meat and some eat new young plants. The large ones which tend to congregate around hog food on damp nights tend to be the large ones which I believe don’t do any harm in the garden but are a bit big for a hog to take on – with their little mouths! They tend to go for the small or medium sized ones which are much smaller – the small ones are the ones which reportedly do most damage to plants – so it’s good the hogs eat those! But the large ones not being eaten is not an indication of whether there are hogs around or not – they tend to ignore them.
Unfortunately it’s the large ones which most people see and don’t like, assuming that they are the ones which cause the plant damage, (as well as the slime). But they are probably the most useful ones to have around, for the garden. Everything has it’s place and it’s purpose.
