We offer three versions, for different types of retriever training. Some of the colors are easier for dogs to see. Dogs don't actually see color. What they see is contrast. For example, the orange dummy can look gray to a dog. The orange is for you - easier to see it. The white dummy has more contrast against a dark background while the black training dummy lights up against a light background. The white/black dummy give you the best of both world. For a more realistic retrieving du