The Lhasa Apso has the characteristics of keen watchfulness and is very playful. The Lhasa Apso is relatively easy to train and craves kindness from all he/she encounters. The Lhasa Apso dog breed is generally happy and is a very good dog for families with children. They are a very keen dog breed as the Lhasa Apso were once used as watchdogs inside Tibetan monasteries for over 1200 years. fOther known traits besides their keen intelligence include their acute hearing and protective instincts for identifying friends from strangers.