I got 2 two day old Australorp chicks yesterday afternoon, they spent atleast 4 hours in the car coming home. They seemed okay when I moved them into the brooder, one fell down a bit, but I thought just weak and tired. This morning that same one is scratching at his head and chripping real loud. When he stops scratching, he seems dizzy. He is eating and drinking fine, and poo is normal. Could he have an inner ear infection? Is that possible?