JBD Center-Official Thread wrote:As it reaches its 20 years of age, as well as adulthood, the JBD will start developing its horns. Due to differences between JBDs, some might develop their horns later than the rest. If it hasn't started developing its horns by the age of 25, the JBD is considered to have Young Forever Syndrome (YFS). A JBD's horns don't stop growing, so the bigger the horns, the older the JBD is. An Adult JBDs seeks for a mate, and once it finds its "other half", the happy couple will mate for life.

