#10 Daban-daban nau'ikan karnuka da suka gabata sun shiga cikin ƙirƙirar Rat Terrier.
Yayin da aka fara ketare tarkacen fox masu santsi da kuma Manchester terriers a farkon ƙarni na 19, daga baya aka ƙara beagle da whippet, wanda tare ya haifar da fitowar nau'in Rat Terrier.
#11 An ba shi sunan Teddy Roosevelt, wanda ke da sha'awar karnuka na musamman.
Sunan yana nuna ainihin manufar kiwo na karnuka a matsayin pied pipers a gonakin Amurka. Wannan amfani ya sanya su zama ɗaya daga cikin shahararrun karnukan gona a Amurka a farkon shekarun 1900.
#12 Saboda karuwar amfani da magungunan kashe-kashe, duk da haka, an yi amfani da karnuka kaɗan a cikin wannan mahallin tun 1940, ta yadda yawansu ma ya ragu.
FCI ba ta gane irin kare ba amma AKC ke wakilta.