The first time I used it I tried it 1/2 packet for 5 days. It worked for a little while but then my dogs were at it again. So I did 3 weeks, twice a day of only 1 teaspoon and this time only gave it to the dog whom’s stool was being eaten.This is a powder. I put it in the bottom of my dogs food dish, a tiny bit of water and then mix food with it. It worked great with my dogs! I had to use 1 teaspoon of For-Bid twice and a day for 3’weeks. I purchased the 3 boxes of For-Bid to have on hand. I also had to repeat this 3 week dose in all my dogs about 6 months later. A year later and that stage is over. Thank goodness!I highly recommend it! But YOU have to be diligent and make sure to get the dose for the full 3 weeks. PS: it made my dogs poop speckled white, NO diarrhea, and a different odor.