They have demon horses, but not any other "normal" horse species like they do with cat (flowercats) or foxes (aurora foxes) etc.
Like someone already said, pigs. Like someone already said, apes and monkeys.
I noticed there aren't a lot of "ferret" like species or "
Mustelidae" like Raccons, Badgers, or Mongoose (actually mongoose are in the Herpestidae family along with Meerkats, but close enough to be considered "general species blueprint" in world building). She does have something called "Scarfed Weasels" that have appeared occasionally in FF, but nothing she's even gone into detail about.
No Mice or Rats yet, though "Mouse" is listed on the species list.
No Rhinos. No Camels/Llamas or Alpaca. No Giraffe's.....I guess that's about all I can think of.
This is both PK's and Marl's fault, really. Marl's rule for running the wiki is "do not provide content", basically.
Completely and 100%. To add to this, Marl and Glip only allow a very limited handful of people to post on the Wiki in the first place. Which completely defeats the purpose of even having a Wiki because the whole point of having it is so that people can edit it and make it better. I also noticed that the suck immensely at updating it and they don't have pages for recent, VERY relevant characters like Kid Neon. To throw even more shit on top of the pile, they don't have pages for places (Ex: Teslic Yard), things/objects (Ex: Lava Ore) or important plot points (Ex: the disease Itchy Itchy). I mean really, why even have a Wiki at all? And if that wasn't already enough to make your brain want to explode, Check this out:
Marl want people to show their personalities in their entries but A) he doesn't let anyone outside the speshul snowflayke treehouse friends edit it and B) he doesn't allow anyone to speculate or summarize.
But besides that, here's some clips of Marl in the discord server being Marl as usual, no surprise there. Basically he jumps in at random times and swings his dick around in everyone's face like an Ape King for no other reason other than he's married to glip and can: