Fleas, Ticks and Worms – Recommendations for Controlling Them in Dogs

Recommendations for Parasite Control

Administer year-round treatment with heartworm preventives that have broad-spectrum activity against parasites with zoonotic potential.

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Administer preventive flea and/or tick products year-round.

If optimal year-round heartworm preventive/intestinal parasite products are not used:

http://www.petsandparasites.org/about/parasite-control-guidelines.html