Asking the important question here

Does Sunset use her past knowledge to excel at natural horsemanship?

@Background Pony #A3F3
It’s not a Cutie Mark it’s a spotted blanket pattern.

@Phantom Rider  
a mouse?

So if human = pony and dog = dragon, then what does a normal horse become in Equestria?

Well TECHNICALLY they aren’t just horses, they are ponies. Maybe pony ponies look just like them in the human world too and this guy is a horsey horse. Like Troubleshoes.

@Background Pony #08FA  
well it cant be derpy

That horse has a cutie mark its look like bubble

Why have we not named this horse yet? Give him or her its own tag? I’d like to call them “Real Horse”

@Group935Pony  
yes

Wasn’t this screencap used as fan-fic art?

i wonder what would happen if normal horses passed through the portal

All ponies are horses… Not all horses are ponies…

Now this is some shonkey juxtaposition right here.

I came here to find funny (and suggestive) comments about a pony riding a horse. I was disappointed.

@James739  
And what I said was that I clearly indicated my theory as simply a theory, but you treated it as if I was trying to state a fact.

@Poptard  
I stated facts so far, not theory

@James739  
Exactly my point. Turning non-sapient mice into sapient equines would be weird. And turning them BACK would be weird and raise all sorts of ethical issues.
 
And likewise, how would gorillas living in the jungle (it’s 4AM and I don’t feel like checking their habitat on Wikipedia) and the show never being there (I think they might have been there during the Daring Do episode, but I’d have to check and it’s still 4AM like it was five seconds ago) do anything but support my point that you can’t rule them out. Plus, a gorilla could also turn up if they ever visit a zoo… Or at Fluttershy’s house (which is admittedly something of a free-range zoo itself).
 
 
@gittonsxv  
Not the word I’d use. The word I’d use is “disquieting”.

@James739  
So, to criticise my perceived statement of putting my ideas as fact (despite me prefacing my original claim with an acknowledgement how it’s only a headcanon), you respond by stating your own ideas as an absolute fact and refuse to consider alternate theories?
 
Well, okay.

@Scrounge  
mice aren’t sentient, and gorillas live in jungles, we’ve only been in forests in Equestria

@Scrounge  
what a clusterfuck.

@gittonsxv  
It becomes a non-sapient human.

SO WHAT HAPPENS IF THE HORSE GOES THO THE PORTAL??

@James739  
No, it just means non-sapient ones have not been shown. I don’t think that they’ve shown gorillas, either, but that doesn’t imply that Equestria has never heard of gorillas, does it?
 
Also, in “The Bst Night Ever”, Twilight uses her magic to turn mice into horses. Take this how you will.