I have a small flock of 9 birds. I have had no non predator deaths in three years but have just lost (2) year and a half old hens and I dont know the cause. These two birds were the low birds in the po so it took a while to notice the changes. They both stopped laying...I thought they were being run out of the boxes. I had found a couple eggs in the run. They then got lethargic, their combs shriveld and their plumage paled. This lasted a while so I thought they were maybe molting. I then tried seven dusting and worming...nothing changed. Another month went by and hey both died within days of each other. My other birds are fine and haVe been fine throughout this time that lasted about three months. Any insights would be appreciated. If it helps the birds were a Hamburg and a Cubalaya from Ideal.