No babies (that I have seen anyway) and no sign of the fighting stopping. I tried them out together once or twice and she just goes chasing after him as soon as she sees him. Not entirely sure what to do from here.

It's so strange, they were so nice with each other in the beginning.
Someone did suggest that if she is indeed female the violence could be because she is sexually mature and doesnt want to mate with him? Is that a possibilty?