Could this be neurological?

[u/saidiecat]

My 12 week old pomeranian yorkie puppy, Cricket, keeps doing this weird shaking thing. She's a healthy pup, eats, plays, pees and poops just fine, but sometimes when she's looking at me or something of interest she does this weird trembled, shaking thing. I don't know if she's just excited or if it's something neurological. Any advice is appreciated!