Because the above comment seems sort of random without its context, I wanted to explain that it was part of a larger conversation I had with AAS about large, untrained dogs that would benefit from rescue/ fostering and rehabilitation, but would likely not do well in a shelter situation.

This really only applies to shelters, not pounds. I've never actually seen a dog stay in the pound long enough to have lasting behavioural consequences. Here in Whitehorse, the city pound is only required to hold dogs ad cats for 48 hours, or 72 hours if they are identifiable by a tattoo, licence or microchip. The reality is few dogs are in there for longer than a week. Most are claimed by their owners or transferred to the Humane Society; the remainder are euthanized.