Old school hunters around here use to tell me to step in a pile of cow crap before i walked to my stand to cover my scent. Thats how common cows are around here.
I live smack dab in the center of a farming community where people brag about tire size on their manure trucks. My best friends farm is where I do a lot of hunting, and I will periodically hang my outer layers of hunting clothing in the barn overnight when they are starting to get some "Me" smell to them. I dont get winded and am honestly, pretty lazy at times about scent control. (Like going straight from work or college after a day of sweating and straight to the woods.) Seems to work for me, but I am in an area where I can go see 2000 cows within a mile. Wouldnt recomend it if not where cows are as abundant.