So you have a friend who's obsessed with her cat. As a cat owner, her big complaint is that she can't bring her cat anywhere. She's right, in this regard. Dog owners can drag their dogs anywhere: to the store, to the bar, to brunch, on a beach vacation (dogs LOVE beach vacations).
Cats, on the other hand, don't travel well. Show me a person who tries to put their cat on a leash and I'll show you a person with clawed up hands. That's why your cat obsessed friend will shriek with joy when you get her this Cat Portrait Pendant ($50, Jasmin Blanc Boutique). Send in some photos of your friend's cat and the artist will create an uncanny portrait of the cat on a porcelain pendant. Now your friend WILL be able to take her cat everywhere she goes from now on. Take that, dog people.