Pt: 1 Malamute's Luna (so fast) and Avalanche love playing together

Luna and Avalanche are playing and enjoying each other... We are now letting them be together/playing without Luna be controlled on a leash (preventive measures). We believe in "preventive-maintanace" to assure that our goal is always safety first which is to have control just in case Luna gets aggressive or something and cause's a scuffle etc etc. You get my point. Everything is going great, we had her for a week now.