Dogs, just like humans are all unique and will respond to different situations in different ways.
Some dogs can undergo trauma and seem to be completely unaffected at all.
Others can undergo trauma and seem to be unaffected, and then something small happens, totally unrelated to the trauma and the dog ‘loses it’.
Some dogs are badly affected by trauma and other dogs just slightly affected – some dogs do not seem to be affected at all – there is no possible way that we can generalize and say all dogs respond the same.