SUMMARY: Just went for a short walk----maybe 3/4 miles, leisurely, on the flat. As I was getting the leashes out, Tika was doing explosive leaps straight up into the air, all four feet of the ground; spinning and dancing wildly; and of course making a joyous noise unto the hall. No sign of a limp at any pace. Gah. It's that on-again, off-again that's so hard to figure out.