There's a LOT of little horses suddenly appearing everywhere. Louis doesn't get it, but this is his first experience of Batshit Wonderland Shit- he has to start somewhere, he guesses. He's wandering around, exploring the lay of the land (and, quietly, feeding the instinct to patrol, just in case) when he comes across the pony freaking out.

He doesn't recognise Dipper, or course. But he does pause, because the tiny pony is screaming about fingers and that's new.

"I'm pretty sure if you did have fingers, that would be some kind of nightmare fuel, just saying. Let's not defile nature's laws here."

He's helping.