Tragically we lost a puppy to Distemper today - poor little Tawney succumbed to this awful disease. Tawney was a puppy that was dumped outside the Sanctuary a few weeks ago with her brother Toffee. Although all our adult dogs are vaccinated against distemper, vaccination doesn't give 100% protection.
It just trains the immune system to recognise the virus when a dog first comes into contact with it so that it can mount an immediate response. There is no cure for Distemper - its all down to whether the immune cells can overpower it before it proliferates in a dog's system. Also, there are different strains of the virus so if the strain is different, it can take a little longer for the immune cells to figure out how to kill it.