I did not socialize my birds when they were young, so now at three years old I do not pick up any of my girls because they won't let me. My 15 girls have a 320 sq ft run completey shaded with plenty of water and a little pool to wade in. They are out free ranging when we are home to keep an eye on them, at least 4-6 hours daily. I feed Flock Raiser made by Purina-20% protein, and vegetable / fruit table scrapes. They are free to roam my garden which is raised beds and protected with chicken wire and bird netting so they lay in the shady damp side in the heat of the day and dig for bugs at the base of the beds. I sprinkle the run with DE every few months, no bugs, mites or lice. The only pesticide I have used is Sevin. I have used it twice this year for the squash bugs. It is not suppose to harm chickens. I have a three year old speckles sussex hen that needed to go back in the run a bit early tonight. She does not like our rooster so when everyone is out she spends her time up by the back porch either alone or with two other hens that will come up the the house. I picked her up (grabbed her) and I was shocked that I could feel her breast bone. It is hot here now. 100-103 degrees every day and since it has turned hot I have noticed all my girls and the rooster seemed to have lost weight. Egg production is down but typical due to the heat. Should I be able to feel her breatbone??!!!! What could be wrong???!!!! Is this an emergency??? She acts fine, roaming everywhere. Thanks for your help!!!