Q1: He growled because they were making a dominance gesture. A dominant dog does NOT like having anything wrapped across its neck, but will submit to any treatment by its leader..
Q2: He was a dominant dog and regarded the house as "his pack's" territory.
Q3: You don't say all that happened between him and the landlord, but I doubt that he was traumatised (although the landlord might have been). But dogs appear "prejudiced" because their noses tell them that "this person eats this diet" and "that person eats that diet", and they react to the strangeness of the odours permeating from people who eat a diet different than their family does. as with the Indian shopkeeper who bought a GSD from a Pakeha ("white") friend of mine. Very soon the dog liked only Indians.
Q4: Experience. Herding breeds can learn VERY quickly. PS: He should NOT have been given lollipops.
Q5: Because he was happy with his own food, and because no-one used food to teach him to beg-sit. None of my GSDs begged when I'm at the table - if I bring KFC home they lie where they can watch me, because they know to not be "pushy" while waiting for a bone to be lobbed at particular mouth. But when I'm spreading interesting-to-dogs things on my sandwich in the kitchen, THEN they sit ostentatiously to tell me they WOULD like a bit, please.
Q6: He could - but don't ask us whether he DID. BTW: His kibble should NOT have been "always there" - that 'on demand' system is the WORST way to feed a dog, research having proven that it increases the amount of HD in litters. And I personally disapprove of all kibbles.
"Crow was a Black German Shepherd\Border Collie, he lived to be Fifteen, and was born (And Died) near my birthday. I am Fifteen."
So his training period was completed BEFORE you developed any memories. So you can't KNOW what training your parents gave him.
Q7: Presumably because his breeder had no other species and your household had no other pets. What a pup doesn't experience before it is 13 weeks old is always something to be suspicious of. And Crow was also obviously a dominant, territorial pooch.
Q8: I find that hard to believe. I would expect your whole household to be safe near him.
Q9: A fit is what epileptics have.
You don't say what HIS behaviour was and in which ways your father would mock him. But dogs are EXPERT at reading body-language and voice-tone. I imagine that one or both signalled your father's intentions to Crow. Your father probably also stared at Crow while mocking him - dominant dogs do NOT like being stared at. Staring is normally a challenge, but because your father was almost certain to be your "household pack leader" Crow was emotionally prevented from retaliating.
◙ To ask about GSDs or BCs, join some of the YahooGroups dedicated to various aspects of living with them. Each group's Home page tells you which aspects they like to discuss, and how active they are. Unlike YA, they are set up so that you can have an ongoing discussion with follow-up questions for clarification. Most allow you to include photos in your messages.
Les P, owner of GSD_Friendly: http://pets.groups.yahoo.com/group/GSD_Friendly
"In GSDs" as of 1967