Last week we lost a duck and a BR hen. I found feathers of the duck but not the hen. We assumed it was eaten. Tonight I went to lock up the chickens and the count was short 1. I started looking around with no luck. Finally I spotted the hen dead under the coop. After looking under the coop I spotted the other hen we lost last week way in the back under the coop. I retrieved the 2 hens and inspected. The is no evidence of predators. They look like they might have died of old age. What is killing my girls? They are all 7 months old. They all looked healthy. Can it be worms maybe? Ive never wormed them. Please help I only have 5 BRs left.