Ofaya daga cikin alamun da aka fi sani a cikin kare shine na girgiza dukkan jikinsa, duk da cewa da yawa basu san dalilin wannan halin ba. Haƙiƙa ita ce, akasin abin da ake yawan gaskatawa, waɗannan girgiza ba wai kawai ana nufin su kawar da danshi daga jiki ba ne, amma suna ɓoye wasu dalilai na asali.
Daya daga cikin mafiya yawan dalilan shine, kamar yadda mukace, bushe lokacin da suka jike. Asalinsa daidai yake a cikin dabi'arsu ta rayuwa, tunda zama da danshi tsawon lokaci na iya zama illa ga wadannan dabbobi. Bugu da kari, jika gashi yana rage saurin gudu da saurin kuzari. Tare da wannan isharar mai sauki, zasu iya kawar da kusan kashi 70% na danshi a cikin 'yan sakan kaɗan.
Karnuka kuma sukan girgiza akai akai akan farkawa, domin kawar da yiwuwar cututtukan waje sun daidaita a jikinka yayin bacci. Kuma shi ne cewa a cikin yanayin yanayi, suna kwana a waje kuma a cikin hulɗa kai tsaye tare da garken garkensu, wanda ya fi dacewa da harin kwari.
Kadan sanannun shine gaskiyar cewa karnuka suna girgiza su gyara yanayin motsin ka. Hakan ba yana nufin suna ƙoƙarin kawar da mummunan motsin rai bane, ko kuma mai kyau ba. Haƙiƙa hanya ce ta shakatawa da dawowa cikin yanayinku na yau da kullun. Wannan shine dalilin da ya sa galibi suke yin wannan ishara bayan wani abin da suka ɓata mana rai ko kuma bayan fuskantar mawuyacin hali a gare su.
Hakanan, waɗannan dabbobin suna yawan girgiza kansu bayan aikin tsabtace jiki ko tsabtace jiki (tsabtace kunne, wanka, da sauransu). Wannan saboda ci gaba da tuntuɓar kai tsaye yana iya zama musu haushi.
Idan kare kawai ya girgiza kansa, to da alama muna fuskantar shari'ar otitis ko wasu hangula a kunnuwa, kamar mamayewar jikin baƙon; girgiza kai hanya ɗaya ce don magance ƙaiƙayi. Idan aka ba mu wannan alamar, zai fi kyau mu je asibitin dabbobi da wuri-wuri.