IJack Russell Terrier ingumthombo wamandla angenamkhawulo othanda abanikazi bayo. Bathembeke ngokwedlulele emndenini wabo futhi bathanda abanikazi babo ngokungapheli. Nakuba ekuqaleni lezi zinja zadalwa futhi zafuywa njengezinja ezizingelayo, namuhla yonke indawo zihlala emindenini njengezilwane ezifuywayo ezingakaze zizingele enye into ngaphandle kwethoyizi noma umsila wazo empilweni yazo.
Inani elikhulu lamandla aliyona inkinga - inja ikhuthele kakhulu, ithanda ukuhamba futhi idlale imidlalo yangaphandle ngaphandle nasekhaya. Kodwa-ke, azikonakali kakhulu, futhi ngemfundo efanele nokunakekelwa, zizoba inja ehlakaniphe kakhulu futhi enhle kunazo zonke emhlabeni. Yiqiniso, uma ungadingi imisebenzi yokuphepha, lapho inja kufanele imise umhlaseli futhi ngesikhathi esifanayo ikwazi ukubangela umonakalo omkhulu kuye, ngenxa nje yobukhulu namandla ayo.