Recent hot and humid weather has contributed to the outbreak, which is transmitted through the hair or feet of infected dogs, contaminated shoes and clothing.

Infected dogs and puppies will usually become ill within 7-10 days of the initial infection.

"Adult dogs don't necessarily need a booster if they have already had their shots," Australian Veterinary Association president Dr Rod Starr said.

However, it is critical that puppies are vaccinated.

Symptoms include vomiting, loss of appetite, fever and diarrhoea.

Unvaccinated puppies are most at risk, although adult dogs can also become infected.

Infected dogs have just a 50per cent chance of survival.

Most vets recommend vaccinating puppies every three to four weeks, starting at six weeks of age.

Details: AVA here.