What exactly is sour crop? Some friends of mine who LOVE their chickens and spoil them unmercifully [but do not currently have access to a computer] told me their ISA, who is, I THINK, going on about three years of age, has not been "quite right" lately. Initially, the bird was "throwing up" which was a new one to all of us. She seemed fine aside from the throwing up. They were concerned about this but in every other way she seemed fine. Later, her pecking order seemed to change and she didn't really seem herself. Now she is in the house (because of the cold temps outside and also because of their concern for her) but she is still not quite right. They mentioned a foul odor which made me think of a post I had seen here describing sour crop. Can anyone help? Are there other conditions that might produce these symptoms? Thanks for any help!