Shih Tzu yog ib qho ntawm feem ntau ancient breeds. Cov kev tshawb fawb tsis ntev los no tau pom tias "cov dev chrysanthemum" yog ze rau lawv cov poj koob yawm txwv qus - hma dua li, piv txwv li, mastiffs thiab tus tswv yug yaj.
Cov neeg laus cov tsiaj muaj tus cwj pwm ntawm tus kheej thiab muaj lub siab ruaj khov. Lawv tsis yog cowardly lossis ntxhov siab.