Several weeks ago I found our barred rock, Checkers, collapsed. I brought her inside to cool her off, thinking it was the heat. (It's around 110 here.) She wasn't improving, and fearing for her life, I took her to the vet. They weren't able to save her. The vet felt it was something other than the heat. Concerned for our other chickens, we had a necropsy done. The vet called with the results. She said it was an infection of her reproductive tract. It was specific to her, so I didn't need to worry about the others catching it. But she also mentioned e-coli could have been transmitted in her poo. So do I worry or not? Here is the diagnosis and comment section of the report: Diagnosis: 1. Acute neuraxonal degeneration, brainstem, optic globes, and white matter of cerebellum. 2. Yolk coelomitis with folliucular degeneration and free yolk in the oviduct. 3. Mild heterophilic splenitis. 4. Mild chronic enteritis. Comment: Histologic changes in this case are consistent with yolk coelomitis. The changes in the brain account for the clinical presentation and are likely due to hypoxia associated with a yolk embolus, although the embolus is not present in the plane of section. I am suspicious, based on the gross presentation and histologic changes, that this bird may have low grade sepsis and bacterial oophoritis, and an addendum will follow with results of culture. The histologic changes in the intestine are consistent with chronic antigenic stimulation, likely due to low grade parasitism, although no parasites were seen. The intestinal lesion was likely well tolerated, as this bird was in good to excellent nutritional status at the time of death. Addendum: Aerobic culture of the ovary revealed light growth of Proteus and two strains of E. coli. I believe that the Proteus is a contaminant, but that the E. coli may have contributed to the yolk coelomitis. The bolded statements are what concern me for the other chickens. I had their droppings tested back in Jan. Nothing. All you more experience chicken lovers, do you see anything in this report that I should worry about? What should I do? I have one hen that has not been laying most of the summer. Then she started laying after Checkers died. A couple soft eggs, a few normal eggs, now nothing again. She has been getting in the nest, but not laying. Could she have the same thing?