i have used revolution on all my girls for years..no problems..no fleas and negative HW tests every year. As far as puppies, it is my understanding that the immunities are still in their system from the mother but not sure how long that lasts. Heartworms are from Mosquitos so they wouldn't show up for years. That will not come out in a stool sample..heartworms are detected from a blood sample. Tapeworms come from ingesting a flea. The REvolution is for flea/heartworm prevention. I wouldn't mix other products in the same month as it would be too much for their systems to handle. I would think that f you don't have mosquitos in your area, you don't need to treat for those. Texas has mosquitos year round so we have to treat every month. |