Sheep Spawn Error

I made a new world using minecraft 14w18b to find out the new stuff. I generated new terrain and when sheep spawned the only colors were white (usual) and pink. I searched a lot, and found NO SHEEP that had a color that's not pink or white. So whenever sheep spawn in Minecraft 14w18b and Minecraft 14w19a they're either white or pink, something I personally, and possibly others find annoying.