Pullet twisting neck/ twitching breast?

[mprivett]

I have a pullet who is not foraging with the others quite as much and acting a little lethargic today. She stands there and her breast and neck sort of twitches and turns every minute or so. I'm not sure if something went down the wrong way or maybe her crops impacted? It didn't feel like an impacted crop but I'm not positive.

Should I start her on some vitamins or give her extra calcium? Please help!