Hookworm infection causes significant suffering in dogs, particularly puppies, through intestinal blood loss and anemia that can be rapidly fatal without treatment.
Hookworm infection causes measurable suffering through intestinal blood loss resulting in iron-deficiency anemia, with severe weakness, lethargy, and rapid cardiovascular deterioration in heavily infected puppies. The pain from intestinal attachment is not well characterized but intestinal inflammation and damage from feeding worms causes significant local irritation. Puppies with severe infections deteriorate rapidly and visibly - pale mucous membranes, weakness, and collapse indicate life-threatening anemia. The emergence of anthelmintic-resistant hookworm strains, particularly in racing greyhounds and now spreading to the broader dog population, presents a growing welfare challenge as standard treatments fail. Prevention through regular deworming, fecal examination, and environmental hygiene is straightforward and effective.