[Ladymom]

If he doesn't improve, ask your vet to consider AAI. Unfortunately, it is congenital in Yorkies. We've had a few here on YT with it:

Roo Bear Yorkies & Biewers- home for Biewer Yorkshire a la Pom Pon and Yorkshire Terriers - atlantoaxialinstability

http://www.yorkietalk.com/forums/sic...some-help.html

http://www.yorkietalk.com/forums/sic...ry-urgent.html

http://www.yorkietalk.com/forums/sic...bluxation.html