Quail chick seems to have seizures! Please help

[Pinga]

I have 5 new quail chick that are 18 days old. Today I noticed one of them having something like a seizure. It holds its head near to the ground, its behind up high, runs backwards and wiggles its head from one side to the other. After these attacks, it stayed still for quite a while with its head pressed to the ground and its behind up high. In the past 2 hours I counted 4 or 5 such seizures, and managed to record one. The video I took doesn't really do it justice though, as the other seizures/attacks were way more dramatic, but this was the only one I managed to capture on tape so far.
If anyone knows what could be wrong with it, please let me know!

Edit: having trouble uploading the vid, so I try uploading a shortened version to vimeo and embed it.

 

[Pinga]

Additional info: It's eating and drinking normally, I have special high quality quail chick feed that I bought for them, its droppings look normal, it's not being bullied by the other chicks, I change their drinking water 3-4 times a day and make sure their feeding dish is clean, I change their bedding every 1-2 days. I have no idea why it's having these seizures or what could be causing them.

 

[GgsFlock2023]

Hi there I was wondering if you ever found out what was wrong with it and did it live?

 

[Pinga]

Hi there I was wondering if you ever found out what was wrong with it and did it live?

Hi. I have no idea what was wrong with her. She still lives and stopped having those seizure-like attacks and is doing fine as far as I can tell. Laying eggs everyday, is tame (doesn't mind much being picked up) and enjoying life. As to what the cause was of her seizures, I have absolutely no idea to this day.