Warning signs for the illness include doing loads of laundry based on color and fabric so that you have the right sort of dryer lint for dubbing and mentally grading the pelts of road-kill you drive past. (I don't actually collect it, I just grade it.) Personally, I knew I had a problem when I found myself wondering if the neighborhood hummingbirds could be trained to molt where I could recover the feathers. (I wish that I was kidding. )