Barred Rock hen unable to cluck or bawk

I recently purchased a barred rock hen and realized soon after introducing her to her new coop and flock that she was hoarse for lack of a better term. She could make a very raspy noise but spent lots of time attempting to call in a series of mouth openings with no sound. I would tend to believe that a mute chicken wouldn't persist with those types of motions if it were a prolonged injury. Wouldn't we see an extinction of the innate neck motions that come with chicken calling if the bird was unable to call? The reason I ask is that the owner tells me she was always a quiet bird. Could she have a deformity or malformation that is hindering her ability to communicate? So many questions. Looking for advice on how to treat this anomaly (first time chicken owner, so this is a first for me) in the form of any home remedies or signs that I should be looking for in determing what is wrong with my chicken.

Thanks!

 

With a dropper? Syringe? Spoon?

 

No, she is healthy otherwise. No tell-tale symptoms. The olive oil, in a very small slow administration seemed to bring her voice back a tad. The rest of the new additions look great. I isolated a lower totem hen as she was being feather picked.