Do heart-worms come out in dogs feces?

Heartworms do not come out in a dog's feces. Instead, heartworms live in the heart and pulmonary arteries of infected dogs, where they can grow into mature worms and produce microfilariae. These microfilariae circulate in the dog's bloodstream and can be detected through blood tests, but they are not excreted in feces. If you suspect your dog has heartworms, it's important to consult a veterinarian for diagnosis and treatment.