Oh she barks at him and tries to get at him but we have Louis in a caged area -- we used an exercise pen to establish his territory and his cage is raised up off the ground. He actually has quite the digs! When we cuddle Louis in our arms Soda just wants to give him a sniff or two but when he's down (behind the cage walls) the chase begins!
The bunny doesn't seen at all bothered by it. He actually seems to enjoy it and darts out on purpose just to get Soda going!