Has anyone heard of this? Last year I had a vet who specializes in chickens tell me that flake hay can cause lung problems. At least, I think this is what she told me but she hasn't answered my last email asking for clarification. Has anyone heard of this or experienced it first hand? Or can you think of any reason that flake hay shouldn't be given? My chickens really enjoyed it last winter, especially with all the snow which kept them in their run, and I wanted to use it again this year.