Thanks to all. I am going to have wider runs but 3 ft is about as wide as I can fit in with the doors. They will be 10ft long. Plus they have a large concrete play area. The building will be right outside my back door. All momma's will be brought in the house to diliver & stay in for a few weeks or longer if necessary. I am concerned about their size, i wanted to raise some very small pups. My male is 2&1/4 lbs & from small parents. If the girls have any trouble they will be spade & sold for pets or kept for pets.
I do love all my dogs but am not sure about more than 2 or 3 in the house. I did raise Yorkies about 15 years ago. I had small ones & not much trouble. My Husband & I are retired & have time to devote.