LAS VEGAS (AP) — From a litter box that automatically cleans itself to buttons designed to allow your dog to communicate with you, this year’s CES tech show in Las Vegas featured a range of products aimed at gadget-loving pet owners. Big and small companies representing everything from the food to the automobile industries put their latest products on display at the show, which wrapped up Sunday. While some of the products are already available for purchase in the U.S., others, like Ilume's smart dog bowl, are not yet.