This is an open species, you can make an OC of it for free if you wanna. It doesn't have to be a dog, it can be any anthro top Lizard, cat, fox, wolf, etc. And the horse part can be any horse including zebras, mules, donkeys, giraffes, etc. It's a very free species with a range of animal combos

Oh and you can do either 1 or 2, whichever you like better