Complete source list – Link #152: German Shepherds Are the 3rd Most Intelligent Dog in the World
http://en.wikipedia.org/wiki/Poodle
http://en.wikipedia.org/wiki/German_Shepherd
http://pets.webmd.com/dogs/features/how-smart-is-your-dog
http://www.livescience.com/5613-dogs-smart-2-year-kids.html
http://www.vetstreet.com/our-pet-experts/5-smartest-dog-breeds-chosen-by-veterinary-professionals
https://www.rover.com/blog/smartest-dog-breeds/?nabe=5128858191790080:1,5407363399942144:0
