[matese]

Louisiana is one of the states that does not have laws on puppies age to be sold. This is obviously a BYB, the deed is done and OP has the puppy. My concern is, one bowel movement in 3 days and vet only gives vitamins.
Has your puppy had a bowel movement since the vet visit? Stress is a factor but not going for several days is a health issue. Also, NO vaccines should be given to this puppy until it is 8 weeks old. The puppy receives immunity from the mothers milk. Any vaccines given to the puppy under 8 weeks old are useless and would have to be given again when he is 8 weeks old. April 13 now it's the 11th your puppy will be 7 weeks old and you stated he is going for "his next set of shots". I think you should be seeing another vet. No vet should be giving a 6 week old any vaccines. Another concern I have is....you have a 7 month old Rotti and a wee little 6 week old yorkie, two puppies that play HARD, my concern is your Rotti puppy will crush this wee lil yorkie, I see disaster here. I do hope when these two puppies are together you are there to closely supervise them. A puppy Rotti rough housing with a 6 week old yorkie . Please supervise carefully.