Forgive me if this is the wrong spot to post it, but I was thinking it might be an interesting idea. Could be useful to identify species by if they're dominant or submissive. Say like "Dominant_Canine" or "Submissive_Feline" or even getting down further in the species list like "Dominant_Wolf" or "Submissive_domestic_cat"
This would allow users to search for more specific images or hide things they don't want to see.