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Originally Posted by BrooklynBlues  The heartworm medicines are a scam. The educated way to deal with the heartworm threat is to test your dog for heartworms three times a year (i.e. once every 4 months).
If the test results continue to be negative, there is no reason to give the dog heartworm medication EVER.
If a test is positive, give your dog a regular dose of ivermectin, and that will take care of the larvae. Remember, 4 months is not enough for adult heartworms to develop, so the treatment will be the same as the so called "preventative."
More reading: Are drug companies honest about heartworm? |
No clue where you came up with this protocol and your facts are simply not true. Within TWO months of being bitten by a mosquito, a dog can have adult heartworms and need heartworm treatment. Preventatives do not kill adult heartworms.
If you are following this protocol, you are playing with fire and putting your pets at risk of contracting heartworms.
Not only that, testing like you are talking about would probably cost more than purchasing a year's supply of Heartgard.
American Heartworm Society | FAQs