I have an almost 7yr old tabby. My husband and I have noticed recently that she does this weird shaky meow. If I get to her in time I've seen her quiver or her hair on ends. I'm not sure what's wrong with her. I know it's not chattering. the times where she's made the weird sound aren't very often but lately I've noticed it happening more. She's usually just sitting somewhere and out of no where it happens. The other day she was just sleeping in the sink and it happened. It startled her as I could hear her knock down a cup. She appears fine after a couple of seconds and back to her usual self. She's a very sweet cat. I'm worried she's experiencing seizures of some kind or that she has some neurological disease.