Easiest to Train Small Dogs
This list ranks each small dog by how quickly it learns commands. From fastest at the top to slowest at the bottom. The fast learners are obviously much easier to train. The slower learners require more patience to train.
Keep in mind that just because a dog is a very fast learner, for example: a Poodle, it doesn't necessarily mean he is more intelligent then a slower learning breed. It just means he learns commands and remembers them better then the slower learners under him. (Maybe the slowest learning breed is actually so "intelligent" that he decided he would rather not waste his time learning your commands?) It really depends on what your definition of intelligent is.
