Last week I lost a huge beautiful Brahma pullet, 6 months old. She had a limp for several days. No sign of injury or infection. Then she suddenly weakened and died. Yesterday, a 2 month old pullet started limping, and now another of my 2 month old group is limping. I have brought no new birds into my flock. The coop is cleaned regularly and bedded with shavings, water changed daily. I have purchases hatching eggs on line and hatched them, however, the affected youngsters are from my own hatching eggs. I am terrified. I have altogether about 40 birds. I live in a very wet and cold area of the Pacific Northwest. They free range almost every day. However the young birds were not outside the coop until today, when they were moved to a new covered pen outside. I am just terrified.