I guess I am pinning this thread "puppy got bit by a bigger GSD" to the early socialization because there are so many points useful to discussion in socializing your pup to dog . Puppy got bit by a bigger GSD
In this case both young dogs were totally over excited . The other dog owner's description was "super friendly" which may be a total misread on seemingly harmless behaviour from his viewpoint , but totally , blatantly , different when perceived from the two dogs' perception .
First impressions. Each dog took a read on the other . Neither in a calm state - two over excited pups . Neither old enough to have established trust from the respective owner, neither one old enough to have controllability so that the situation could be controlled, before it got out of hand. Both dogs were indifferent to the owners. Simple youthful rambunctiousness propelled them into a situation where the youngest was cowed , the older dog emboldened , excited by prey squeals bites the young one more . The situation was ripe for social conflict .
Once separated both had their hair up and still in a state of confused fear (aggressive) arousal.
When you introduce a young dog to another only do so if you know the other dog , and the other dog is not indifferent to the owner , and be able to control your young one so that it is not disrespectful to the older dog - who will give a deserved correction .
Read an interview of Martina Urich , handler of Decster von Barbatus , 9th place Baunatal BSP trials, in Das Schaferhund Magazin.
When asked how Decster was socialized the answer was that there was no particular format , but many things are learned by the young whelp just by living a normal life (Viele Dinge lernt ein Welpe bei mir schon im, normalen Leben) . A little food motivation work, a little booty drive with the tugs . Time goes quickly .
The dog was introduced to working around other dogs around 10 to 12 months and made the first schutzhund club at 12 months.