Parvovirus is a small non-enveloped DNA virus, which needs actively dividing cells to replicate in, such as those within the gastrointestinal tract and immune system of the dog(7). The challenge with parvovirus is that it is highly contagious via the faeco-oral route and very resistant in the environment; providing a source of re-infection during outbreaks. Up to date vaccinations are protective but one must remember the role of ‘Herd immunity’. This is when, if a large proportion of individuals within a population are vaccinated, they indirectly protect the unvaccinated individuals. However, if the critical number of vaccinated animals is not maintained, the disease is more likely to spread, possibly even to vaccinated individuals, particularly more susceptible breeds such as Rottweiler’s and Labradors(7).