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Updated on September 23rd, 2025
Does a vet have to give puppies heartworm prevention?
2 Answers

Answered By Maria DVM
Veterinarian
Published on February 18th, 2018
Answered By Dr. Elizabeth
Veterinarian
Published on April 7th, 2019
Heartworm prevention can be started at any age. While some parts of the country have heart worms year-round, other parts only have a heartworm season. A local veterinarian is the best person to answer your question as to when to start the prevention. Typically the prevention requires one visit for a heartworm test (a blood test). Prevention is a tablet given once a month. As long as you give the tablet each month you will not need to repeat a heartworm test until the next year. The test must be done once a year to sell the prevention. You do not require a visit every time you get the heartworm preventative unless your pet is growing. Then you just need to get her weight so you can get the correct size tablet. Adult dogs can also get an injectable product that last six months. This must be administered by the veterinarian. I hope this answers your questions and please feel free to post any additional questions.
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