Thank you both for the insight!
We started her on vitamins and let her go overnight to see how things progressed.
We haven't seen her do that seize-y thing since later that evening—so we're hopeful. Just assuming it was some sort of tick that she had when she adjusted her crop. It has resulted...
Our 6-day-old Laced Wyandott recently started seizing/twitching. We didn't notice it this morning, but this evening it started and seems to happen every 30 seconds or so. Video here:
Everything is normal, eating/drinking/activity level/poop.
The two other chicks aren't exhibiting any of the...