I was informed at pups second vaccinations that there is a further vaccination that can be given at 16 weeks for Parvo. The vet said we are not in a high risk area but it is recommended for Black and Tan dogs and the such. Now I don’t know wether he meant singularly or like Rottweilers. Has anyone had the second shot done or is it not really necessary? Any info or advice would be greatly appreciated. Thanks in advance.