Thread:The S/@comment-995426-20150930093401/@comment-995426-20151001103332

May I recreate Category:Pigs? (I only ask because it turns out you're the one who deleted it, and I don't know the reasons.) The usefulness of its existence hasn't actually gone away. Six articles are still plugged into Category:Pigs, and Category:Pigs used to plug into Category:Characters by Species and Category:Mammals (both of which exist). The alternative is categorizing all six pig-related articles into Category:Mammals directly, which in my opinion would unnecessarily clutter Category:Mammals which is better suited for subcategories and for single entries of characters whose species has not been used in TMNT more than once.

I have over a decade of experience at Wikipedia and Wiktionary, and have set up many category hierarchies. In general, it's bad practice for categories to be too cluttered when entries can be delegated neatly into subcategories.