Distemper in Dogs: Why Vaccination Matters

Parvovirus gets the attention, because it kills quickly and visibly. Distemper is the quieter one, and in several ways the worse of the two. It attacks a number of body systems in turn, there is no specific treatment for it, and many of the dogs that survive are left permanently damaged.

It is also almost entirely preventable, which is the part worth holding on to.

How it spreads

Mainly through the air, from coughing and sneezing, and through shared bowls and close contact. It is highly contagious between dogs, and unvaccinated puppies are the most vulnerable.

Unlike parvovirus, distemper does not survive long in the environment, so transmission generally requires reasonably close contact with an infected animal rather than contaminated ground.

How it progresses

Distemper moves through the body in stages, which is why owners often think the dog is recovering partway through.

First: respiratory and fever

Fever, thick discharge from eyes and nose, coughing, lethargy, loss of appetite. Easily mistaken for kennel cough or an ordinary infection.

Then: gut

Vomiting and diarrhoea, dehydration, weight loss. At this point some dogs appear to improve, which is when the diagnosis is most often missed.

Then: nervous system

Days or weeks later, and sometimes after apparent recovery: muscle twitching, head tilt, circling, weakness, incoordination, seizures. This is the stage that kills most of the dogs that die, and the one that leaves lasting damage in those that live.

The signature signs

Two are characteristic enough to be worth recognising. Hardening of the nose and paw pads, giving distemper its old name of hard pad disease. And a rhythmic muscle twitch, often in the face or a limb, which frequently persists for life in survivors.

Why there is no cure

No drug kills the virus. Treatment supports the dog while its immune system fights: fluids, anti-nausea medication, antibiotics for secondary bacterial infections, anticonvulsants if seizures develop, and nursing.

That means outcome depends heavily on how strong the immune response is, which in turn depends on the dog's age and condition. Puppies do worst.

What survival looks like

Dogs that survive the first two stages may still develop neurological signs weeks later. Those that develop them often keep some degree of twitching, weakness or seizure tendency permanently. Teeth in puppies infected during development may be malformed for life.

This is the part owners are not usually told: recovery from distemper is not always a return to normal.

Prevention, which is straightforward

Distemper is covered by the standard combination vaccine, the DHPP or DHLPP given to puppies, with the D standing for distemper.

• The full puppy course, spaced properly, with the final dose at fourteen to sixteen weeks
• Boosters as your vet advises
• Keep unvaccinated puppies away from unknown dogs and from crowded places until a week or two after the final dose

A puppy that has had one or two doses of the course is not protected. This matters particularly for dogs bought from markets or roadside sellers, where a partial course and a confident assurance are common.

If you suspect it

Call the clinic before arriving. Distemper is airborne and a waiting room full of puppies is exactly where it should not be. Most clinics will bring a suspected case in separately.

Isolate the dog from other dogs at home, and treat bowls, bedding and your hands as contaminated between animals.

Buying a puppy: what to ask

• Dated vaccination records, not a verbal assurance that "it has had its injections"
• Which vaccine and how many doses, since one dose is not a course
• Where the litter was kept, and whether other puppies have been ill
• Whether you can see the mother, whose own vaccination status matters to the litter

A seller who cannot produce dated records has told you what you need to know.

Distemper is the clearest possible case for finishing a vaccination course, and the reason courses go unfinished is nearly always the same: three or four clinic visits landing in the same few weeks that a new puppy needs everything else bought at once.

Core vaccinations and the consultations around them are covered on Skeepy Pet HMO plans, so the third dose, which is the one most likely to actually protect, stops being the one that gets postponed.