Odd that you should mention that. I was in a BK that Ive visited occasionally for 30+ years. Nothing unusual ever until then. A couple of days ago a client made me go there. I entered and noticed a smell very much like that. Im surrounded by dairy farms for miles, Ive become quite familiar with the smell. I thought someone had maybe done something in the store so I moved around and no, couldn’t escape the smell. As soon as I walked out it was gone again.