The ability of a dog to learn from humans has often been linked to its intelligence. Using the dog breeds topic from PetBreeds and data from The Intelligence of Dogs by UBC psychology professor Stanley Coren, we found and ranked the 17 least intelligent dogs by obedience intelligence.
Decades later, in 1945, Dumbledore finally defeated the now-Dark wizard Grindelwald, who had come to possess the Elder Wand. Grindelwald's defeat made Dumbledore the master of the Elder Wand, which remained his until just before his death, when Draco used the Disarming Charm on him.
Ariana Dumbledore (c. 1885 - late summer 1899) was a half-blood witch and the youngest child and only daughter of Percival and Kendra Dumbledore. She was the younger sister of Albus and Aberforth Dumbledore. At the age of six, Ariana was attacked by Muggle boys who saw her practising magic, which left her traumatised to the point of rendering her magical abilities uncontrollable.