Have just read through it,thankyou,and am still a bit confused but gather that the usual booster is done every 2 years and part of that booster is done every year.Is that right?So I should go ahead and keep the appointment for the part booster.Hopefully my vet will agree but what if he doesnt??I,m worried about the immune bit though because in the thread it said that it was triggered by a vaccination on one dog but with Benj he hadnt had a vacccination he just started with it.I,m also confused because the vet said it was haemorraghic gastroenteritis but that his body was attacking itself and the immune system was to do with it.Is anyone able to explain to a total dimwit what all this means?Could this have been anything to do with him having vacs every year?When I rescued him he hadnt had any vaccinations at all and he was 3 and a half.So the vet started him as if he was a puppy and I have just gone from there and had him vaxed every year since til now.