Try using it again. Once a week for three weeks is recommended.
Dogs are living flea magnets. If the area they live in has fleas, those fleas will move to the dog. If that’s the case, you have to solve that problem first.
Truthfully, we can’t say that our products kill all insects at all stages of their lives. All we can say is that our products will help. The rest is up to you. But if you are truly dissatisfied, return the product and we will be happy to give you your money back.