I reintroduced my boy Ira back into the girls cage a couple of weeks ago. The littlest one Koi love to jump on him- he fights back-- but I am scared because she has made him fall down the ramps--- he hasn't gotten hurt-- but she keeps jumping on him. We don't have her spayed, but its too risky because she is too little. What can I do? Should I put her in her own cage? any advice?