Is Luna on any type of medication? My Puddy twitched like that, it was a little tic that she developed while on some meds but when I discontinued them, the twitching stopped. Also, the B vitamins is a great idea and, yes, they do work fast. I also put Puddy on B complex vitamins, injected them right into her bag of fluids when she was on subQ's and the positive change was immediate.

There is a condition called hyperesthesia, a skin condition that can cause twitching but I can't recall too much about it. I looked into it when Puddy was twitching but, as I said, hers was due to medication. Also, if a cat is low on potassium, it can twitch but I hear that Rescue Remedy in the drinking water is good for that.

If Luna continues w/the twitching, you'll have to get some tests done but if the B complex vitamins stopped it, then you may just have found the solution. Let us know how she's doing.