SUMMARY: Everything seems fine.
Tika's been off the rimadyl for 4 days now. She's done plenty of running, I've gradually added back in tug-o-war (although still trying to keep the violence level a little down from normal); have done bunches of weaves, some contacts, tunnels. Jumped 20" in class this week and we never saw any sign of a problem or slowdown.
I have no idea what the problem was. Haven't taken her anywhere for a follow-up, since the problem seems to have vanished. If there's a chiro on site at this weekend's trial, I'll probably try to arrange a session there. Otherwise, I'm letting it slide again.
The trial this weekend is only one day for us--Saturday is all Masters; Sunday is Novice and Advanced. Today it has been raining steadily and I haven't been outside with the dogs even once. This is kind of rare for California, this continuous, all-day precipitation. And in theory it might be going on all week. Crud--and just when I need to be working her more to get her back up to 26".
(And, sorry, you'll have to wait another day for my part 2 of Rachel's seminar info.)