How to deworm a dog internally and externally?

For internal and external deworming, use separate products. External options include fipronil, selamectin, and methoprene, generally once a month by weight, with no bath 3 days before or after.

Internal options include albendazole, ivermectin, praziquantel, and pyrantel. Puppies monthly, adults every 2-3 months, dosed by weight.

Overdosing may poison the dog.