Where Did That Fluff Come From

Where did it come from? We stare at it. Is it part of the dog's tail? Or another thing he has dragged home from the neighbors? Is it part of the memory foam mattress he has already chewed? We stare at Buddy; he is giving us a practiced angelic pose. We do not discover what it was until three days later All the stuffing inside my husband's left boot has been chewed out.