We've been super busy around here. We thought that we had it all figured by now. Our girls are older hens now. Two of them are 7 years old. The youngest ones are 4/5 years old. Last week I noticed that one of the girls looked bloated and lethargic. She seemed to be suffering so I put her down. I blamed it on her old age. Today I find another girl in the same condition. She is 6 years old and a barred rock. Can you give any information/help? I still have ten other girls.