This afternoon I noticed none of my chickens were by the gate so I went to see what they were doing. They had been sitting near one of my big hens who was squatting under a tarp, out of sight. Everyone except her came running when I gave them grapes. I checked her out and she could not stand up. She was leaning to the right and not putting much weight on her left side and it looked like she had less control there. I picked her up and put her in the coop and gave her a good once over. I didn't find anything out of the ordinary other than she was having a hard time breathing. She seemed thirsty so I gave her warm water with a syringe and added a little sugar. Set up a kennel in the house and took her in. Gave her a little more sugar water and sat with her. She became a little more active for a couple of minutes and then had a terrible seizure and died. She was fine this morning. Her vent was clean when I checked it earlier. When she died, she passed a small amount of thin white poo. Her feathers were fine, her body looked fine. I could find nothing wrong with her other than her breast bone seemed a little pointed. She was breathing with difficulty when I first picked her up and then was starting to breath through her mouth. I called the vet and they said maybe she had a bacterial infection. The hen house is clean and we just put fresh straw in yesterday. The water is changed out every two days. The feed is fresh and I use only premium grain. They get fruit and veggies when I have some left over. All fresh. Does anyone have any idea why she died? The other hens seemed fine and were very active when I checked on them this afternoon. Any help would be greatly appreciated. I don't want to lose any more of the girls.