my sister has them,
also trained in German in many cases
(& one Konie as her personal dog)
she gets or fosters, former military dogs or washed out dogs
& sometimes places them with vets/fosters to help with PSTD
I don't think she has any 'currently' other than her dog Konie
Konie is a trip, he is really better with men,
he tolerates my sister, she feeds & plays with him
he was raised in a 4x8' pen for the 1st 2 years
the only time he was let out, was to train,
"allegedly" it's the military way, now he does not like the kennel
he was an ordnance dog IIRC, trained to go in "Rat holes"
or dwelling 1st to weed the "subjects out"
you see his extensive training sometimes too
not for everyone
if they are trained well, they are excellent dogs
if not they can be a real handful
pretty much like any working dog