Okay maybe not that interesting.
It was fan theory for yonks either way.
Quote from: Local Trouble on Today at 03:52:24 AMMaybe to prevent self-harm. It could be that a facehugger instinctively knows whether its host is both conscious and intelligent. If so, it may have to keep the host comatose longer to scrub its memory of the encounter, so the host doesn't just kill itself to prevent a more painful death.
This could also explain the much shorter implantation time in Alien 3.
Then you have a pretty normal gestation in the dog but a much longer growth to adult.