Saib ntawm Chihuahua, nws tuaj yeem piav qhia tias yog tus dev nrawm nrawm, nrog cov tshuaj tiv thaiv zoo, tus cwj pwm zoo, tsis ntshai kiag li. Lawv yog cov tsis tshua muaj mobile, inquisitive, nkees, thiab hardy. Los ntawm kev npau taws, Chihuahuas yog phooj ywg rau tib neeg thiab lwm yam tsiaj, tsis muaj kev npau taws thiab kev ua siab phem. Ib qho kev txhoj puab heev lossis kev ntshai heev yog suav tias yog qhov tsis tsim nyog rau kev yug me nyuam.
Raws li tus qauv yug, muaj ntau yam xim muaj peev xwm. Chihuahua merle xim muaj teeb meem thiab tsis lees paub thoob ntiaj teb. Cov tsiaj uas muaj xim no tuaj yeem ntsib teeb meem hnov lus thiab pom kev, suav nrog qee qhov ua rau lag ntseg, nce intraocular siab, ametropia (qhov muag plooj ntawm daim duab ntawm lub retina), microphthalmos (me me ntawm lub qhov muag), coloboma (cov menyuam kawm ntawv tsis xws luag), pob txha txawv txav, reproductive systems, thiab lub plawv.