Heartworms mature and can live unnoticed in infected dogs. An unprotected dog is at risk for infection, even as you love, play with, and care for it.
Signs of heartworm disease in dogs can be subtle and difficult to detect in the early stages. As the disease progresses and damages the heart, lungs, or kidneys, signs begin to appear. The disease can become severe and even fatal.
Contact your veterinarian immediately if you notice these signs in your dog:
Dogs and puppies should be tested for heartworm infection prior to beginning a heartworm disease prevention program. The American Heartworm Society and Companion Animal Parasite Council highly recommend annual testing for heartworm to ensure that your dog is free of heartworm infection1, and it is likely that your veterinarian will test your dog according to established guidelines. Annual testing can help reassure that your dog has the heartworm prevention it needs.