Puppies are under house?

I have a pit bull who gave birth about a week and 1/2 ago. She has about two because we can look in the vents to see them. She comes out to eat and play for a little while and go back under to nurse. I was wondering should we have taken the puppies from under there to another place. we see the puppies playing together , well they just kinda wobble around and squeal at each other. I think she was born under a house also.