I have noticed this on a couple of occassions: Friday will take off at high-speed. I live in a small apartment and she gets pretty much the run of the place when I am home. I was sitting in the kitchen on the floor wanting to play with her. She would run/dart to me and quickly run into the bedroom. Back and forth, back and forth. But I'm talking about FAST running. Her eyes looked wild and there was no calming her down until she was ready. I didn't know what to do, but when she settled down, I took her to her water bowl and drank a good amount.
Was she just playing? We had gone for a walk earlier in the evening.
Was she just playing? We had gone for a walk earlier in the evening.