I'm moving out of my apartment and into a house with a friend of mine. Her chihuahua mix had puppies around 8-10 weeks ago. None of which have been vaccinated. Out of the 5, 3 were sold leaving 2. Whether she plans to sell the other 2, I'm not sure. My concern is that I have a Great Dane pup who is 10 weeks old. He's had his 2nd round of shots and won't get his last 2 until 13 weeks and 17 weeks. Should I be concerned about having my pup around the other puppies?