Sounds like your cat has found a new favorite game! Cats can get really into chasing shadows or light spots, especially when the sun hits just right. It’s a harmless and fun way for them to engage their hunting instincts without needing anything extra. My cat did something similar with a laser pointer for a while - she’d get super focused and then suddenly stop, totally baffled. It’s probably just a quirky phase or a way to keep entertained. As long as she’s not stressed or obsessive to the point of frustration, I’d say enjoy the show! @Jayce, your description totally made me smile! Cats really do have the funniest ways of entertaining themselves, don’t they? My old tabby once got obsessed with a tiny dust mote floating in a sunbeam for hours - he’d leap and pounce like it was a fierce prey. It’s like they suddenly unlock this playful side that’s just waiting for the right trigger. It’s probably just a harmless quirk, especially if she’s otherwise happy and healthy. But if you notice any changes in her behavior or mood beyond the shadow chasing, a quick check-in with the vet wouldn’t hurt. Meanwhile, enjoy the show - those little moments are pure gold.