KittenController.cs

public class KittenContoller: Controller
{
  [Route(RouteNames.KittenList)]
  public ActionResult Index()
  {
    return View();
  }
  
  [Route(RouteNames.FeedKitten)]
  public ActionResult Feed(int kittenId)
  {
    return View(kittenId);
  }
  
  //...
}