We picked him up at 7 weeks. He appeared to be the pick of the litter, the only one of the pups that came over to meet us. The others all hid.
the breeder , who ever they are , should stop .
you have a problem that has nothing to do with socializing .
there are people out there breeding GSD for the pet market and they
do not have a single molecule of a clue as to what the GSD temperament
should be and the importance of "aggression" in the breed.
it is one of the fundamental cornerstones of this breeds character.
when not considered or deliberately removed (attempted) then you have
a confused mess of an animal and you can not properly know what to expect
tgere is no reliable . there is no predictable .
is this a breeder who bragged about large dogs?
90 pounds is heavy .
He " has never shown aggression toward anyone."
why should he? Has there been a reason where you felt he failed .
he plays endlessly with dogs or people that he is familiar with -- ???
the big puppy thing --
BUT here is a big problem
"My concern is he is quite scared of anything or anyone he isn't familiar with. Every person or animal we meet outside of the house terrifies him. He is also scared of some inanimate objects."
this is NOT normal -- the dog lacks sound nerve . His entire litter from your description
lack sound nerve .
How do you transition from stranger danger to "familiar" play mate friend?
you can't let your guard down -- he may be accepting of someone and then freak
and without warning bolt o do a defensive bite when he can not escape.
same with your environmental issues -- you don't know the full extent of what might
trigger a fear reaction -- for his safety , yours and the public at large - you have to
be fully focused on the dog while out and the dog on lead.
being a passive dog walker isn't going to cut it.
you aren't going to fix genetic problems - but you can help with some of the
brain chemistry
diet -- what is he eating .