Tabbas mun lura cewa karenmu wani lokacin yakan motsa kuma ya girgiza kafafunsa lokacin da yake bacci, ko da haushi ko nishi. Kuma kamar yadda masana suka fada, karnuka suna da hutu sosai kwatankwacin na mutane, gami da kasancewar su mafarkai da mafarkai. Suna faruwa a lokacin da ake kira REM phase (Rapid Eye Movement).
Ana bayyana wannan ta hanyar karatu daban-daban, daga ciki muna faɗakar da waɗanda masanin ilimin canine ya aiwatar Stanley Coren. A cewar wannan masanin, karnuka suna mafarki a cikin irin wannan hanyar zuwa namu, lokutan hutu tare da wasu na farkawa. A wannan yanayin, lokacin REM yana ɗaukar kusan tsakanin minti 10 zuwa 15 kuma ana maimaita shi kusan sau huɗu a dare.
Kodayake wannan ma ya dogara da halaye na kowane irin. Misali, ana tsammanin Saint Bernard yana da dogon buri da karancin mafarkai, yayin da Terrier na Scotland ke da gajeren lokacin bacci.
Kamar yadda Coren yayi bayani, ta hanyar gabatar da tsarin bacci iri daya, abu ne mai yiyuwa su yi mafarki irin namu; wato, tuno da ranar su zuwa yau, tsoransu da ayyukansu. Suna karɓar bayani ta hanyar kamshi, sauti da motsawar gani, waɗanda ake canza su zuwa tunani ta hanyar wannan aikin ƙwaƙwalwar ba da son rai ba.
Game da nigthmares, suna da mitoci daban-daban dangane da yanayi da salon kowane kare. Kodayake idan muka lura cewa ana maimaita su akai-akai, suna hana dabbobin mu hutawa, dole ne mu je wurin likitan dabbobi don sanin ko waɗannan mafarkin da muke yi suna faruwa ne ta matsalar lafiya.
Game da hanyar aiki a waɗannan lokutan, mafi kyawun abu shine kar mu tayar da dabbakamar yadda zai iya cizon mu. Da kyau dai, muna yi musu sannu a hankali kuma muna magana da ƙaramar murya har sai sun huce. A gefe guda kuma, sanya kayan wasan su kusa da wurin hutawar su zai taimaka mana mu guji irin wannan mummunan mafarki.