Internal Parasites

Internal parasites are commonly called worms. Most internal parasites live in the dog's intestines where they feed and reproduce.  All puppies should be examined by a veterinarian for internal parasites. Your veterinarian can detect the presence of most worms by examining your puppy's feces. Some parasites, such as hookworms and roundworms, can be transmitted from the mother to the puppies before birth or during nursing.

Canine heartworm disease is among the most serious health hazards affecting dogs of all ages.

Hookworms are among the most dangerous of all the intestinal parasites, especially in puppies. They attach themselves to the intestinal wall of the infected puppy and suck blood, causing severe anemia which sometimes can be fatal. Signs of hookworm infection include lethargy, poor appetite, anemia and black tarry stools which may contain blood.

Roundworm, a thin, spaghetti-like parasite up to five inches long, is probably the most common intestinal parasite of young dogs. Puppies are infected by way of the placenta before birth. After birth, the puppy can become infected by larvae in the mother's milk. In the small intestine, roundworms compete with the puppy for nutrients, resulting in stunted growth and poor health. Roundworms often make a puppy look 'pot-bellied.' Other signs include diarrhea, poor haircoat, listlessness and poor growth. Microscopic examination of fecal matter is needed to diagnose roundworms and hookworms. Your veterinarian can prescribe appropriate medication and a schedule to follow to prevent reinfection.

Whipworm infection can become severe before any noticeable symptoms appear. As the infection progresses, symptoms include diarrhea, abdominal pain, nervousness, weight loss and anemia. Usually these problems are expected in puppies over three months old. Untreated severe whipworm infections may occasionally be fatal.

Tapeworms can be transmitted by fleas, rodents or rabbits which may be eaten by dogs. A mild tapeworm infection may go unnoticed. Signs of a more severe tapeworm infection include abdominal discomfort, lethargy and diarrhea alternating with constipation. There are numerous species of tapeworm. Different tapeworm species require different medications. Consequently, the veterinarian?s diagnosis and instructions for administering any wormer are important.