Cages for household pets; Pet treat jars; Animal-activated pet feeders that include dispensers for releasing pet toy feeder balls with pet food and pet treats therein; Filters for use in cat litter boxes; Pet litter boxes; Cat litter pans; Toothbrushes for pets; Whelping boxes for dogs; Pet drinking bowls; Pet dishes; Pet bowls; Pet water bowls; Automatic pet feeders; Automatic pet waterers; Cages for pets