Sort of - it's more accurate to say that the order Perissodactyla (containing horses) shares a common ancestor with the order carnivora labeled #4 in the pictur

Sort of - it's more accurate to say that the order Perissodactyla (containing horses) shares a common ancestor with the order carnivora labeled #4 in the picture. Both of them share a common ancestor with artiodactyla (even toed ungulates like antelope) labeled #3. They all differentiated over 60 million years ago, though, which was enough time for mammals to split into herbivores and carnivores and evolve back into sea animals like whales and dolphins. With converging and diverging evolution over that kind of time span, saying an animal is "closer to" another over simplifies a lot of detail. One species' genetics might resemble one order while the slowly evolving genes used to identify evolutionary relationships place it in a second order.