Breed Wiki Choose “Select by Breed” for detailed descriptions, or “Search by Characteristics” to focus your search across several breeds. Size Not Important Toy Small Medium Large Giant Energy Level Not Important Couch Potato Low Energy Medium Energy High Energy Non-Stop Energy Barking Level Not Important Barks Rarely Low Barker Medium Barker High Barker Non-Stop Barking Shedding Level Not Important Non-Shedder Sheds Rarely Low Shedder Medium Shedder High Shedder Hypoallergenic Not Important Yes No Trainability Not Important Not Very Trainable Somewhat Trainable Trainable Very Obedient Completely Trainable