I have three dogs who are currently working nose work courses. All three are obsessed with the training after a short week. One is twelve years old and needed something to do after retirement from agility. The baby less than 2 years old has needed confidence building. Scent work has done that. The third has taken to it mostly for the treats but is more enthusiastic about it than agility, rally or the breed ring. Glad to see an activity that meets the needs of young. Old and in between.