I've went to Pet Cetera yesterday and I've found the stuff that stops your dog eating poop.
It's called "Deter 8 in 1" I figured out its not powder, it's tablets that you put in your dog's food each meal. I've just been giving it to my dog yesterday so I dunno if its working or not. It says to give it to your dog for 2 weeks and observe. If it doesn't work, then you give the dog 2 tablets...and so on.