Yes, every year, at the end of the mating season. Even if they are not really horns; the appendages of the deer (Cervus elaphus) are formed by a bone tissue and not, like the permanent ones of cattle, of horny tissue, and are defined stages. The stage of the male, which can be more or less large depending on the age and feeding of the animal, is reformed every year in the same way, with the same arrangement of branches and bifurcations, to which a new spike is added a few centimeters long. If you have the opportunity to see an adult animal between February and March, you can see two sketches on the forehead. They are the scars of the fallen stages and the point of formation of the new ones. The growth process is not painless. Velvet, as the new bone is called, is strongly innervated, rich in blood and extremely sensitive. In this period the males are very nervous and feed on large amounts of food. Adult male trophies can reach a weight of 15-18 pounds.