I have a 2 year old Americana who was fine until this morning. I noticed she's wheezing a little and not moving very fast. As I watched her, she came out of the henhouse and has been squatting in the run. I can see her straining and, as her back is to me, I can see her vent - it looks like she's trying to lay, but nothing will come out. Of course, I just noticed the behavior an hour ago, so maybe she's just not "there" yet. Should I intervene and try to break the egg or massage it to help, or should I let her go on her own for a bit first? When should I "get involved"? Thanks!