my chickens are dying

[sliver2006]

3 of my chicken are losing there cockscomb and they seem to be dying from it any idea they are about 2 years old they are laying chickens

 

[terryg]

Are they a production breed? The best layers often give out by the age of two, or get cancer. Take a look at my blog about dark combs and see if that's what you see in your flock. http://hencam.com/henblog/2012/04/agnes-dark-comb/