Owning cats and dogs might make you think twice about installing carpeted stairs. It is not easy to keep these pets from tearing at your carpeting, but there are some helpful tips you can use to divert their interest.  Giving your cat a designated scratching post. Certain scents will repel cats without harming them. Citrus is a great example. Try essential oils or lemon water and see which scents keep your particular cat away. A scratching post and scents also work well combined with keeping your cat’s interest focused on other areas.