This is the best wormer there is! It takes care of all worms out there! Normally, you have to get several wormers to take care of all the different types of worms. We do rescue for dogs and have quite a few at a time. We have 9 right now! But, when we were taking the dogs to the vet...it was costing us an arm and a leg, so the vet told us to go to the feed supply store and buy a bottle of this. He helped us calculate the dosages for our dogs and we've been using it ever since. It has saved a ton of money being able to worm all the dogs ourselves!