A carlanca or carranca is a collar with spikes placed dogs to protect them from predators.The carlancas are rigid protections that are placed to the mastiffs around the neck and have sharp needles to prevent the bites of wolves. The carlancas are utensils own dogs to guard livestock. They are made of iron or other metals.There are carlancas in various ways: a single Strip, various articulated parts, etc. Constitute a variation of the same leather Spiked collars.The name of 34, carlanca 34, derived from carlanco ( ancient form in it was the wolves 41. It would be a " lobera " or protection from wolves or other highly dangerous dogs.