It does not sound like anything I have seen or heard of in cavaliers.
Originally Posted by gadgetfreak
Are you thinking he is having trouble with his jaw bone? It is certainly possible for humans to experience subluxation ( partial dislocation) of their jaw. This occasionally happened to my Father when he yawned, sometimes it stuck for hours and it was dreadfully painful until it clicked back into place.
I hope you manage to video it so your vet can see what happens.
Cavaliers......Tommy Tuppence 2000-2012 and a half share of Faith.
Japanese Chins.... Dandy, Benny, Bridgette and Hana.