Well it is back to childhood memories for my Six Sentence Stories - Rank post. I hope that you will take a minute to click the link to see some of the creative efforts of other writers for this challenge. There are a number of ways the word "rank" could be used in a story, so I'm sure you'll find some interesting stories.
How was it possible for the cows to eat it, she wondered. Could they not smell it as the steam arose from the piles in bunkers at daybreak? She had tasted the blackstrap molasses that the cows sometimes were given, but that other stuff, not on a dare! The taste of grain and alfalfa pellets wasn't bad either to her way of thinking. She had even chewed on a piece of sweet hay and of straw more than once, but she would never dream of eating even a morsel of that fermented cow chow. Fortunately for her, their cows didn't have to be fed the rank smelling silage that many beef cattle were given.