Every time I have gone out to feed my two english game hens, one of them inevitably lets out a very very long whistle fart that goes on for about 1-2 minutes. She does it so regularly that I've gotten a good look to see if something is wrong with her when it's happening. Other than getting in what looks like a determined position to let push the gas out by squatting somewhat she doesn't seemed bothered in the least. In fact she's often come to eat while still farting, seriously. How bad it is does vary, but I always hear at least one short, very audible one. Knowing how smart chickens can be, I've wondered at times if she is doing this on purpose as some sort of joke on me. Really though, I am a bit concerned even though she seems to be very healthy otherwise. I'm wondering if maybe what is happening is some sort of fistula has formed between her cloaca and an air sac. Has anyone ever heard of such a thing happening? If that were the case though, I'd think she'd be experiencing some sort of infection by now, unless the pressure in the air sacs is so consistent that it prevents anything from entering it from the cloaca. Does anyone have some ideas as to why this chicken is such a long-winded farting machine?