Thanks for your message,
@Staci & Ivy! I haven't even had time to check up on you in the past few days & say hi.
Yes, I too think it looks like a bounce, and although Lu is always so great, for sure she's happier when she's not dramatically high.
In the meantime, another of my cats, the handsome, huge, and normally very timid Gris, hopped the fence and went on a sabbatical. He got into a tussle with a neighbourhood kitty, and ended up with a puncture wound. It was unnoticeable for a couple of days, until on the 3rd day I saw he had a big abcess on his upper chest. After I cleaned it up at home, gave him a day to see if it would heal on its own, it became apparent that it was pretty deep and on the way to being seriously infected. So we went to the vet and all is well now. But no more excursions for Gris! ;-)
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He looks pretty innocent and "Why me?" here.