Do you have a trust fund for you dog?

I have never heard of such a law before, though I know of wealthy people who have left their whole estate to their pet. How does setting up this trust fund work? Do you set aside a certain about of your estate for the care of your dog? Do you name a person to take care of your dog if something happens to you?

I think this is an interesting idea. I've always worried what would happen to my dog should something happen to me. I know that someone in my family would take her in. But, it's still a worry.