Probably. I do have this idea that during Midnight Sparkle's little attack in Friendship Games, she opened portals left and right. And even though she was eventually defeated and cured by Sunset, some portals might still be open somewhere in the bushes around CHS.







If you remember that one scene featuring dog Spike chasing that jackalope (bunny with antlers) through those tiny portals made by Sci-Twi, he still remained a dog. Either those portals don't work on animals, or they are the only ones that'll allow humans to enter Equestria without being ponified.







Even Rarity and two girls nearly fell down a big one that opened above Ponyville, and they were still human while hanging on by the edge.

