My LB is 12 weeks old and I have noticed him doing a strange head movement, its like a shiver but only his head does it, the only other way I can describe it is like when you have a sour sweet and shake your head. I didn't think much of it when I first seen it this week but last night and this morning he has done it a few more times. He hasn't got a temp or anything and seems fine otherwise but it's gotten me really worried especially now I've googled it!! I will call my hv first thing on Monday but just wondered if anyone else had experienced this or know what it could be. I can't find it as it happens out the blue and only for 1-2 seconds