Dogs should be tested for heartworm at least once a year, especially if they are in an area where heartworm is prevalent. However, if your dog is at higher risk due to factors like living in a warm climate, being outdoors frequently, or having missed doses of preventive medication, your veterinarian may recommend more frequent testing. Additionally, puppies should be tested at around 6 months of age, and then annually thereafter. Regular testing is crucial because heartworm disease can be severe and difficult to treat if not caught early.

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Topics covered in this question:

Dog Health Preventive Care Veterinary Advice Dog Wellness Heartworm