Parasites come in many different species and forms and can live both inside and outside your pet. Some of the more common types of internal and external parasites include:
Intestinal (GI) worms
Hookworms (Ancylostoma caninum, Ancylostoma braziliense, Uncinaria stenocephala) are intestinal parasites of the cat and dog that get their name from the hook-like mouthparts they use to anchor themselves to the lining of the intestinal wall. They are so small that it is very difficult to see them with the naked eye.
Despite their small size, they ingest large amounts of blood from the tiny blood vessels in the intestinal wall. A large number of hookworms can cause inflammation in the pet’s intestine, as well as a life-threatening decrease in the number of red bloods cells (called anemia). Anemia is most common in puppies, but can occur in adult dogs.