I am now thinking that Scout was having some neck and/or shoulder spasms on Saturday. A couple of folks at the show and at least one on the blog asked if she seemed to have any pain in her neck - and after she came out of the ring, we could not find any spots that seemed painful to her. Of course, cardis are such stoic little creatures, they really don't want to show when it hurts.
The next morning, a handler who had heard about Saturday but didn't witness it said that she thought Scout was holding her head differently when she saw her walking into the building Sunday morning. Then in the ring Sunday (video here), Scout had to gallop a few times to keep up with Cheryl - especially at the turns. This is unusual for her, and I think she may have still been having issues.
Today I had her chiropractor take a look at the videos (Scout and Cheryl went on to Roanoke VA from Greenville yesterday) and she thinks there may be something going on there. Dr B works with Cheryl too and is going to call her for more info and hopefully give her some ideas on what we can do go give her some relief.