Where can you get them at 5 weeks? What about 2 males housed together when buying them, would that work? I'm considering getting a few in the near future.
Craigslist often advertises them in the pet section. Or google rat breeders (true!!) in your area. The ones in pet stores are usually a little older and not very well socialized but there are exceptions of course.
If they are already peacefully living together, that would work too.
Make sure the sexes are not mixed after 6 weeks or you may end up with a pregnant baby! They are fertile after 5 weeks. That's how they have conquered the world.
Last edited by wolfy dog; 02-18-2014 at 02:11 AM.