Chick acting like something suddenly scared it

[Morrgin]

I have a rescued chick. He's a bit older with full feathers, but he still makes chick noises. He was rescued because I had two hens fighting over the same nest and they were killing the chicks as they hatched. We raised him inside the house with us as a result. The problem is that he acts really weird sometimes. Nothing will be going on and he will suddenly jump in the air and shake while making a loud surprised and scared noise. I even hear him doing it when he is all by himself at night while he is in his enclosed area. It's like he's seeing or feeling things that aren't there. Did he get hit in the head when the hens were fighting over him? Traumatized? Virus? Neurological disorder?

 

[Silviaschicks]

Chickens can hear better than humans, so even if you’re not seeing something he probably heard something that’s making him freak out. Also at night I’m not surprised he’s jumpy even if he’s all by himself as chickens have terrible night vision