When living on the coast of Oregon, town of Depoe Bay, 36 years ago, our cat, Running Bear, brought nemerous things into our house on the cliff above the ocean. Once it was a mouse---only half dead. Once it was a snake-- not dead either. Once it was a sea urchin and I've no idea how he transported that little item since it has numerous spines. The mouse and the snake were sort of buried in his litter box. As with various other things, the sea urchin was left in my boot for me to find AFTER I'd inserted my foot. Once a portion of an aurelia (jelly fish) was left in that same boot. It was an unpleasant surprise !!

Art Thieme