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Most vets require this test once a year.

Before your veterinarian will hand over or sign off on a prescription, your dog must undergo a blood test to ensure they are negative for heartworms. buy heartgard

The U.S. Food and Drug Administration (FDA) strictly regulates heartworm preventatives. Giving Heartgard to a dog that already has an active adult heartworm infection can trigger severe, potentially fatal reactions. 📋 The Essential Guide to Buying Heartgard for Your Dog 1. The Mandatory Heartworm Test Most vets require this test once a year

If you have missed monthly doses, a re-test is absolutely mandatory before resuming the medication. 2. Know Your Options: Heartgard vs. Heartgard Plus buy heartgard