I'm seeing some strange behavior from Bella today with her buckling, Benjamin. Any time he gets his head near hers she will butt him. Not very roughly, but enough to push him away. His belly is full and she's letting him nurse, but I'm just a bit worried about this. We disbudded Benjamin yesterday and she's been a bit put off by the smell of his head, but he's been nursing so I figured it wasn't a big deal, but now I'm not so sure. Is this something to be concerned about?