Hello I live in Texas. Not too cold. I had 7 hens. I have them in a pen that is decently predator proofed. I have a net for air predators, 5ft fences for land predators and their coup has an apron all around it. We do deep cleaning every 2 weeks and daily water and food checks. Their water & food dispenser can sustain them for approximately 2 weeks. I didn't get out to see them for 6 days. We went away on a short trip. Yesterday I went to let them out of their coup to roam the yard and found 2 dead. That is the longest amount of time that I left them unattended. But I can't understand what could have happened. They had plenty of food and water. The other hens looked fine. Should I be worried about the others? I took them to the vet for post mortem analysis but I can't imagine what could have happened. Does anyone have any ideas. Is this unusual? I've had chickens now for 3 years and this has never happened. Any suggestions on what I can do to prevent this from happening again would be greatly appreciated.