www.meetup.com
Is another site that has all sorts of meetup group by area.
The South Bay Yorkshire Terrier Meetup Group is 49 miles from Modesto.
http://yorkie.meetup.com/299/?gj=sj2 ...Zeke's Mom - I think you should join, its free and they have a message board where you can post about Zeke. There are 110 members of that yorkie group - so they could be on the look out too!