While I was watching the DD chapter 4 walk through....I always kind of laughed at the fact Lucky's nose twitches in one of the cutscenes. (I found it adorable and funny) But when I looked up why that happened....I felt like something was very accurate for his animal instincts.
When I looked up why that happened out of curiosity.
As it turns out, it helps rabbits figure out where the others are and it seemed like Lucky knew the fact his clones (including Mallory) were on the other side of one of the doors and we didn't realize before the cutscene ends before the door busts open and the clones chase after us and into the gates.