Is she broody or sick

[landj]

We hve three 8 month old leghorns. One has taken to sitting on the nest. When she comes out around the other two they peck the tar out of her. She shows no other symptoms than this:
1. Won't leave nest 2.Isn't eating or drinking well 3. Her once beautiful comb is limp and faded. HELP she is losing weight fast.

 

[swedishfish]

she may be broody, but I'm not sure. My broodies have never really lost a lot of weight that I've noticed.