I have to commend you on taking the dogs back to their mom. It will greatly increase their mental health.
However, I really really REALLY have to insist you DO NOT breed your dogs. Sit down and really think about the numbers going on around you every single day. Every single day THOUSANDS... yes thousands... of dogs and cats are being killed.
These are animals that were born into this world innocent and beautiful. Then they are abandoned by the people closest to them. Then, if they're lucky and in good health, they sit in a kennel for a certain amount of time. If they don't catch anyone's eye, they get taken into the back room, laid down on a table, given one last pat on the head and kiss on the nose and killed.
This is what happens every single day because there are TOO many dogs in this world. There are too many because people are either willingly breeding them like you want to do, or acquiring a dog and not being able to or refusing to fix it and it gets pregnant or impregnates another dog. Then the puppies get dumped on the streets or impulse buyers get them, and give them to shelters within a year because they outgrow their puppy stage.
However, people breeding purebred dogs responsibly are another story. These are people ensuring that their puppies are healthy, meet breed standards, and are given to good homes forever. They ENSURE the puppies go to good homes.
Don't even get me started on puppy mills. These mills are 100% legal, by the way. Imagine the sheer amount of dogs they alone are producing.
And you want to ADD to that?
Please reconsider and never ever breed these animals. Please get them fixed and give them the best life you can.