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Hookworms attach to a dog’s intestinal lining with their hook-like teeth, leaving bleeding internal wounds. As few as 100 hookworms can cause a puppy to die from blood loss. Hookworm larvae live in soil, and can be swallowed by dogs or penetrate through a dog’s skin. Hookworms are the most common of intestinal parasites, and infect nearly 20% of dogs in the North America.
