[QUOTE=ladyjane;3929667]I don't want to frighten you, but honestly, I would have an xray done before next week. There is a condition called Atlanto Axial Subluxation that can show up in yorkies...we have seen a few on YT this past year. They suddenly develop neck pain with that condition.
Here is a link with information:
ACVS - Atlantoaxial Instability
While it very well might not be that, it is something I would want ruled out immediately if I had a pup with sudden neck discomfort.[/QUOTE
"Rather safe than sorry....." I think I would be cautiously fearful that this could be a possibility, have the dog tested/xrayed and the condition ruled out, then CELEBRATE that is turned out to be a simple sprain!