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SESK: Stuff Everyone Should Know · sesk.info/dog-heartworm-test

How often should dogs be tested for heartworm, per the American Heartworm Society?

Every year.

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  1. Never, if on prevention
  2. Every 5 years
  3. Every year ✔

Why: Annual testing makes sure the preventive is working and catches any infection early. It is usually done at a regular vet visit.

Huh, didn't know that: Early heartworm infection often shows no signs at all.

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References

Answer: Every year. Annual testing makes sure the preventive is working and catches any infection early. It is usually done at a regular vet visit.

  1. American Heartworm Society, Heartworm Basics www.heartwormsociety.org/pet-owner-resources/heartworm-basics
    All dogs should be tested annually for heartworm infection.
    Checked 2026-10-10.

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