How Do I Know If My Pet Has Fleas, Ticks or Worms?

Parasites are not always visible on a pet. Itching or diarrhea may prompt examination and testing to establish whether parasites are involved.

Editorial overview based on the linked VCA resource; this is not the complete original handout. Prepared 2026-10-03; not veterinarian-reviewed. Diagnosis and treatment, including medication choice and dose, require veterinary guidance.