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Parasites - roundworms, whipworms, hookworms and tapeworms - can affect any dog that has contact with the outside world. Transmission normally occurs through contact with infected soil, dogs, and wild animals.

Symptoms of intestinal parasites include weight loss, poor coat condition, vomiting and diarrhea with lethargy, and occasionally a persistent cough. Tapeworms can generally be seen with the naked eye. Evidence includes white rice sized segments moving on feces or around the dog's anal area.

Monthly heartworm preventative can help prevent and control parasite problems. With the exception of tapeworms, most of the products available from your veterinarian protect against intestinal parasites as well as heartworms.

Puppies are most at risk from intestinal parasite infestation and can rapidly end up in a life-threatening situation if parasites are not treated. If you believe that your dog may have parasites, contact your veterinarian to get a diagnosis and start treatment immediately.