this evening in the pouring rain, i had to go out and water the greenhouse, cos of a medical problem hubby bless him insisted on filling the watering cans (still got a hose pipe ban) and he saw loads of slugs on the lawn, and he went back in doors to get some salt to put on them. when i had done in the greenhouse i looked at some of the slugs and noticed that they appeared to have shed their skins and had slid away. Is this normal, i thought salt killed them.