Doctor Horse is identical to S04E12 Unnamed Unicorn Stallion #2 in all but usually mane and tail color and cutie mark, shares his mane and tail style and usually colors and coat and eye colors with Caramel and "Toffee", shares his design and rarely mane and tail colors with "Gary Coronet", shares his design with S04E22 Unnamed Unicorn Stallion #2, "Black Marble", and sometimes "Star Bright" and Top Marks, shares his mane and tail style and coat and eye colors with Warm Front, shares his mane and tail style, eye color, and rarely mane color with S04E24 Unnamed Earth Stallion #6, shares his mane and tail style and rarely color with "Dewdrop", "Sunlight", "Cloud Break", and S04E26 Unnamed Earth Stallion #1, shares his mane and tail style and eye color with BeauDe Mane, Upper East Stride, "Str