Anti-Fairy Measures:
Fairies and goblins try to collect as many souls as they can at Halloween but if they met a person who threw the dust from under their feet at the Fairy then they would be obliged to release any souls that they held captive.
Holy water was sometimes anointed on farm animals to keep them safe during the night. If the animals were showing signs of ill health on All Hallows Eve then they would be spat on to try to ward off any evil spirits.