Txoj kab ntawm tus aub boxer pib los ntawm lub sijhawm thaum Munich Bullenbeiser bitch tau taug kev nrog tus dev ntawm ib qho xim tsis paub, feem ntau yuav - tsuas yog nrog tus dev mongrel yard. Nws yog ntseeg hais tias lub litter uas lawv muaj yog thawj boxers. Ntau precisely, ib tug txiv neej los ntawm no litter npe Lechner yog suav hais tias yog tus progenitor ntawm yug. Thiab tag nrho nws tau tshwm sim thaum kawg ntawm lub xyoo pua 19th.
Thawj cov boxers, Lechner cov me nyuam, tau sau npe ua Bierboxer lossis Modern Bullenbeiser, tab sis tom qab ntawd nws "tus ntxhais" tau sib raug zoo nrog ib tug txiv neej bulldog, uas ua rau cov dev uas tau nthuav tawm thawj zaug ntawm cov dev hauv Munich (thiab tom qab sau npe) ua boxers.