Jasdip - we have 2 Australian Shepherds. They are 5 & 6 - no tails but they wiggle their butts. A few days ago, our older guy was acting weird and out of sorts - we were really worried about him because he didn't wiggle his butt as he normally would but the next day all was well. He's the guy in the tuxedo...

Weird....but...had me doing a double take...you too?

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It's getting to that point. For the record, if I'm standing I'm not tipping.