Vaccinations
Vaccinations were developed to protect animals against infectious diseases that are difficult to treat, and diseases that can often be fatal. The diseases are difficult to control as canine conditions can be spread by foxes and pests such as rats, and the feline ones by feral cats.
Recently there have been outbreaks of Parvovirus which causes severe vomiting and diarrhoea, especially in puppies, and often results in death. There have also been cases of Leptospirosis.