For vegans, the scariest thing about Halloween may be the possibility of accidentally consuming a treat made with animal products. Fortunately, there’s a pillow case-full of holiday treats that are naturally vegan, ripe for eating by the fistfuls. Not all manufacturers will explicitly note whether or not a product is vegan. You can become your own candy detective by storing a few tricks up your sleeve. As People for the Ethical Treatment of Animals advises,…