And for animals like dogs and some birds, set up a reward system, train the animal, then run tests and deduct what can be seen by the behavior of the trained an

And for animals like dogs and some birds, set up a reward system, train the animal, then run tests and deduct what can be seen by the behavior of the trained animal. Dogs see only two colors, this means compared to humans they are color-blind (or something like red-green blind).