Intestinal parasites including roundworms, hookworms, and whipworms cause significant welfare problems in companion dogs, particularly puppies, yet are highly preventable through regular veterinary parasite screening and prevention programs.
Intestinal parasites cause a spectrum of welfare impacts from subclinical malnutrition in mild infections to potentially fatal disease in severe cases. Puppies with heavy roundworm burdens experience chronic nutritional deprivation, pot-bellied appearance, and vulnerability to secondary infections. Hookworm infections cause painful bloody diarrhea and anemia that severely compromises vitality. Many companion dogs carry parasite burdens that go undetected because owners do not request fecal testing and do not recognize the subtle welfare impacts of subclinical infection. Prevention through monthly broad-spectrum products is far superior to treatment, both for welfare and for reducing zoonotic transmission risk.