Several months ago one of my FBCM hens, about 3 years old, developed Ascites. I extracted fluid a few times and then one day noticed that she had fly strike, so we ended her suffering that day. My remaining FBCM hen now has it and I am having a difficult time getting any fluid out. I have two hens who are older, an Australorp and an Easter Egger, neither of which has developed this, and they have all been on the same food, Purina Layena layer pellets. Is it really true that too much protein causes this or is it more common in some breeds than others?