Hmmm...when you put your foot in your welly and it goes 'crunch' you know something isn't right. In my case, something that I suspect is small and furry has been using my wellies as storage for seeds. Sunflower seeds as well - OUR sunflowers seeds!! Never ever leave seeds in a greehouse - they get nibbled on, stored and piddled over. My wellies reek of something amonia-like and it's not pretty.
Karl thought it was cute but my wellies were wet, smelly and awkward to wear. Humph!