I'm not saying not to try, I'm just stating my experience.
If you've got better luck than me, Good on ya.
I'd love to try and keep them separately, and see if they breed.
Each generation imagines itself to be more intelligent than the one that went before it, and wiser than the one that comes after it.
It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.