I think you are right, not having too much repetition on similar species/subspecies. I was thinking for the giraffes not even really creating bachelor or bachelorette exhibits but creating exhibits showcasing other animals, similar to a safari. That way you can keep the animals separate without cross breeding between the two, show case more then just one animal in a exhibit, and creating story on conservation. Showcasing the subspecies/species without creating to much of a repetition that the general public gets bored.
