A guide to canine parasites and diseases every dog owner should know

Learn how to identify common dog illnesses, infections, and parasites—plus when to contact a vet and how to protect your pet with preventive care.

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Feeding your dog nutritious food and ensuring regular exercise are essential—but they’re not always enough to keep illness away.

Dogs, including puppies, can develop diseases and become hosts to parasites, even in well-maintained environments. Recognising early symptoms and seeking timely veterinary care can make a critical difference.

This guide covers common signs of illness in dogs and how to respond effectively.

Watch for Signs of Diarrhea and Dehydration

Diarrhea in dogs, especially in puppies, can indicate anything from dietary changes to bacterial or viral infections.

Monitor hydration closely and consult a vet if symptoms persist beyond 24 hours. Collecting a stool sample may help the vet identify the underlying cause.

Coughing, nasal discharge, or sneezing may signal an upper respiratory infection (URI). These infections can be caused by airborne bacteria or viruses and may be contagious to other animals—and potentially to humans.

Prompt veterinary care is recommended, particularly if the dog shows signs of dehydration or develops more severe symptoms like lethargy or difficulty breathing.

Vaccinations Are Essential

Vaccinations protect dogs from severe diseases like:

  • Parvovirus
  • Distemper
  • Rabies

Most regions require vaccinations by law. Booster shots are usually needed annually to maintain protection.

Vaccinating your dog helps prevent outbreaks and safeguards other pets in the community.

Parasites such as tapeworms, roundworms, and hookworms can affect dogs of any age. Look for signs like small, rice-like particles in your pet’s bedding or near their rear.

Regular vet visits, including fecal testing, help detect and treat parasites early.

Identifying Skin Parasites

External parasites include:

  • Fleas
  • Sarcoptic mites (mange)
  • Ear mites

Scratching, hair loss, skin redness, or excessive grooming may indicate an infestation. Even when mites are not visible, behavioral cues often suggest discomfort.

Treatment should always be prescribed by a veterinarian.

Understanding the signs of illness and parasite activity can help protect your dog’s health. Early intervention and routine veterinary care are essential.

Always consult a licensed veterinarian for proper diagnosis and treatment.

Disclaimer: This content is for informational purposes only and does not substitute for professional veterinary advice. Always consult a qualified veterinarian if you have concerns about your pet’s health.