
Our girls are not confind to home only with with their puppies. After the first 2-3 days a happy relaxed bitch asks to go out with the other dogs for her daily walk, She will come up to our regular walking places and I make sure that she makes no contact with other dogs. The puppies have all their immunity from mum and while they are taking her milk, on their home teritory everything should be fine.
But by the time they are ready to leave home they should have stopped taking mums milk, immunity levells begin to drop and this is where new owners must be carefull and speak to their vet about starting vaccinations, usually between 10 to 12 weeks (depending on your vets recomendations).
A strong healthy pup with its mum should not need any vaccinations under 9 weeks of age, it still has immunity from its mum.