Head shaking when ready to sleep

we have a 3 year old male and we have noticed that in the last week he has been sporadicly having head shakes/tremors it lasts for no more than 30 secsonds and only seems to happen as he is settling down to go to sleep(2or 3 times its happened),other than this he seems perfectly fine eats and drinks ok goes for his walks and still runs around the house like a nutter,he is weeing and has bowl movement as normal,he eats dry food and meat ie chicken,beef,turkey basicly meat we would eat as well as ox-heart,and sometimes chicken or pigs liver and is also partial to a bit of apple or pear if we are eating one.
if anyone has any ideas as to what this could be or if they have come across this themselves then any advice would be welcome(we have been told already that it could be a calcium or vitamin deficincy).
sabians mum and dad.

i dont have a clue you may have go to the vets

Hi and welcome to the forum from Rocky and me.

Agree would be best to get a check up from the vet.

Ear infection? Do his ears look clean, there is no gunkyness or black wax?