I, for one, now want to create an Ox OC. Have we seen any hooved animals in the show NOT be sapient? I'm surprised there aren't deer in the show, they seem sufficiently 'girly' to appeal to their intended demographic. They'd be like... Hindus. Hindu deer. Hindeer. ... /headcanon
Ponies seem to be the main population, but we've also seen a zebra and cows and buffalo and donkeys and dragons and a griffon and I think one goat. They've all been intelligent enough to speak, but don't have cutie marks and seem to be second-class species . . . even though the ponies pretty much treat them as equals. Other animals and beasts have so far been nothing but that, animals and beasts.
Oh god, of course these two would be in the same picture together! XD I love how Cteno is blushing and Surprise is excited, these two are so freaking adorable. Now lets just hope Surprise doesn't do anythng to ruin this for Cteno.