I have a friend who told me I need to wear a mask when I'm cleaning the coop. She said her mother in-law got tuberculosis from having chickens and can't have them anymore... Is that true? I tried googling it and it says chickens can get tuberculosis but nothing really on chickens giving it to humans. We only have 5 chickens and they free range a lot and it doesn't get that dirty... Has anyone heard of this?