Ive used this for about 4 years now on our litters of puppies. We used as directed as 2,3,4,6,8 & 10 weeks and they go to their final exam at 12 weeks before they go home. They have always been healthy and free of worms.
we gave this to our dog and puppies when she had them. they didnt have wormers so i cant say it worked we used it as a prevention for the puppies, and every few months to our dog. the dogs love the taste or mine does she licks the tube clean lol must taste fairly good to dogs