Does my chocolate Orpingtons crop seem oversized to you?

What does a normal crop feel like? I am a newbie and I’m making myself nervous. I’ve had these chicks 2 days now, I lost my Easter Egger last night completely out of the blue. The place I got them from replaced her today and said it was probably because of the way they’re shipped to them without heat.. but I’m not sure. I’m worried my other two are not doing well now. My Orpington is the most energetic, she’s eating and drinking and getting attached to me already but her crop feels like it has air in it, and she’s making a gurgling sound when she drinks water. Earlier she was sleeping on me and she was making a clicking sound. So now I’m terrified she has sour crop. Pls help!