#16 Lub Koom Haum American Kennels Club (AKC) - lub koom haum canine uas koom ua ke txhua hom tsiaj thiab muaj kev lees paub thoob ntiaj teb - tau sau npe cov tsiaj yug los ua Staffordshire Terrier, thiab hauv xyoo 1972, raws li American Staffordshire Terrier.
#17 Hauv 50s. Nyob rau hauv lub xyoo pua 20th, AKC tau tso cai yug me nyuam ntawm Pit Bull Terriers thiab Staffordshire Terriers. Yog li, kev sib ntaus sib tua yog ib nrab lees paub.
Tam sim no, nws tsis raug txwv los ntawm kev yug me nyuam, tab sis tsuas yog sau npe nyob rau hauv American Staffordshire Terrier.