I currently became the owner of 2 female rats (one fancy rat and one dumbo). I have them housed in cage 17" x 30" and 17" high. I would like to start breeding to sustain my collection of 2 bps and help out my buddies with any extra. I have a few questions about it tho.

1. What type of male rat would be best
2. Should I separate the females with some wire running down the center of the cage?
3. Can I just put the male in the the females and remove him when they are pregnant?

Thank you in advance for all of your help.