The chick is 6 weeks old. She will stretch her neck out and open her mouth wide. Sometimes it makes like a clicking sound. She also seems to sneeze fairly regularly. She is the only one who does this. I see some of the others occasionally do one or the other, but it seems more isolated and normal due to dust or something like that. This chick I have taken out of pine shreds (bc of the dust). I give a bit of grit with her food, but she is only eating chick crumbles. Might there be a simple explanation or potentially something more serious? Thanks!