This mosquito-transmitted disease can be fatal to your dog, so aim to prevent the illness. Getting rid of heartworm once a dog is already infected takes powerful drugs and can require hospitalization.
Start with an annual blood test to see if your dog is already carrying these deadly worms. If the test is negative, your veterinarian will recommend a preventive heartworm medication. This may be given either monthly or daily. Some veterinarians recommend giving your dog the medication year-round, but it should at least be administered during the months when mosquitoes are active in your area.