We Have Five Cats And Keep Our Litter Boxes Very

We have five cats and keep our litter boxes very clean. They are indoor cats that have lots of things to climb, play and hide in. They are all long hair cats. Every once in a while we'll find a piece of feces randomly on the floor normally by a litter box as a hang fire but today my husband came home and there was a dried pile of feces on our bed. This has never happened before. Our oldest cat is 8 and our youngest cats are 3.