TAnt30, if you live somewhere with heartworms, you'll want to be giving a heartworm preventative every month, and those do take care of some (not all) common worms/intestinal parasites as well as just the HW. The preventative is low-risk and very well-tolerated by most dogs. For most other parasites you can get away with treating only when you notice a problem, but if you do that with heartworms you're looking at a much harsher treatment that's hard on the dog, limiting exercise, and potential long-term heart damage, so the monthly preventative is FAR preferable.
But I agree with the others. Get the vet to run a fecal (and a blood test for heartworms if they're in your area), and then they can suggest which treatments will work best for whatever they find, if anything.
But I agree with the others. Get the vet to run a fecal (and a blood test for heartworms if they're in your area), and then they can suggest which treatments will work best for whatever they find, if anything.
