Ok theres a big problem, our min pin likes to eat our tabby cats poop out of the litter box!!! Its gotten so bad that we had to put the litter box up, and that gets annoying, so what should we do to stop this problem.

It's possible that your dog's sense of smell detects the signs of food in the tabby's poop. For example if the tabby's food is fish based maybe the dog picks up that smell?
Maybe, consider a slight increase in the food you give your dog?

The only thing I can think of is to put something in the cat's food that will make it's poop undesirable. (I know that sounds silly, but it must be good if the dog wants it.)

There is a powder called Forbid that is tasteless and harmless going in, but the stuff that comes out tastes like we believe crap should.

The only other option I can think of is to baby-gate off the area with the litter box.

All of my Danes LOVE cat poop, and it's led to tapeworms on many occasions... because there are stray cats EVERYWHERE around here.

Dogs just love cat poop. My cat's litter box has to be kept up because my dogs try to eat the poop. The best thing to do is to just keep it up and out of the way.