Hi, can anyone please give me some advice. A week ago I got a 9 wk old puppy (border collie cross with husky) from one of our local rescue centres. He was fine until he after his visit to the vets, full of life and very licky! Max had his 1st injection and seemed ok, however in the last couple of days he has developed a cough and diahorrea. When I phoned the vets they said it was just how some dogs react to the vaccine. Am I over reacting?