I have a 5 month old Holland Lop that I just got a month ago. I've noticed that when I get him out to work on posing or when he's sitting up in his cage he will often have a slight head tilt to the side. His head tilts to whichever side I'm on. When he's laying down or up exploring his head is completely straight. He's eating and drinking well and isn't showing any signs of illness. Is this just who he is or probably head tilt?