Hi, mini rexes are very cute, congratulations. Sounds like fun with the baby bunnies, I could never breed bunnies, or any pets, I would be too worried about finding good homes for them.
I have three bunnies. The boy is black and white, about 6 lbs and 7-8 years old. One girl is all white and I think a polish or a mix of one, she is around 5 years old. The other girl looks like a dutch and is around 3 years old. They are all fixed so no babies. I actually would prefer to have only one bunny. I used to have a single bun, she was a Netherlander dwarf mix, she was adorable and I had a good bond with her. The bunnies I have now are bonded to each other and do not like me at all, only the male will let me pet him a bit sometimes but the girls run if i try to touch them. They are nice to look at but that is all that I am able to do and I miss having a bunny that I can interact with. In the future I plan to just have a single pet again.