Hi there, I have a 9 week old puppy and still another week and a half before shots as they are booked (I even booked shots before I got duke) and my brother reminded me of his staffy who had parvo, she was real sick but luckily survived. Now I'm worried about my pup. I have brought him to my moms yard, my brothers yard, and my yard which he spends a lot of time in. House training from the start no paper training....is this safe? All yards are fenced and all dogs in those yards are vaccinated. How can I make sure he doesn't get sick...I've always had any puppies started at 8 wks on the vax so a little worried about duke.