"Can you clarify what you mean by "How long did the dog get interaction before separation" (do you mean separation from mother). And, few come and go in our house, and certainly that doesn't help with early socialization."

Sure...

"I continued mostly to go on these remote walks until early in 2010 when, in a period of 3 weeks, Mulligan changed..." not enough effective socialization. "...not enough effective socialization."

I guess I linked these statements. Apparently I was incorrect. Also, I thought you might be asking for advice. My mistakes.