Maximus is 1 year and 5 months and still a furball of energy! People told me he would slow down when he was neutered. I was a bit sad and thought I would miss his energy b/c it's one of the reasons I love him so much, but when I brought him home, he was jumping from couch to couch and bringing me his favorite toy for fetch. We walk anywhere from 1-4 miles daily. He still comes in ready to play with anyone who will.