(En.Wikipedia.org)

During the course of 29 April 1945, Hitler learned of the death of his ally Benito Mussolini at the hands of Italian partisans. This, along with the fact the Soviet Red Army was closing in on his location, strengthened Hitler in his resolve not to allow himself or his wife to be captured. That afternoon, Hitler expressed doubts about the cyanide capsules he had received through Heinrich Himmler‘s SS.^[24] By this point, Hitler regarded Himmler as a traitor. To verify the capsules’ contents, Hitler—who already intended to have Blondi killed so that she did not fall into the hands of the Russians^[25]—ordered Dr. Werner Haase to test one on Blondi, and the dog died as a result.^[26] Hitler became completely inconsolable.^[27]

According to a report commissioned by Joseph Stalin and based on eyewitness accounts, Hitler’s dog handler, Feldwebel Fritz Tornow, took Blondi’s pups and shot them in the garden of the bunker complex on 30 April, after Hitler and Eva Braun committed suicide. He also killed Eva Braun’s two dogs, Frau Gerda Christian‘s dogs, and his own dachshund. Tornow was later captured by the Allies.^[28] Erna Flegel who met Hitler and worked at the emergency casualty station in the Reich Chancellery stated in 2005 that Blondi’s death had affected the people in the bunker more than Eva Braun’s suicide.^[29] After the battle in Berlin ended, the remains of Hitler, Braun, and two dogs (thought to be Blondi and her offspring Wulf) were discovered in a shell crater by a unit of SMERSH, the Soviet counter-intelligence agency.^[30][31] The dog thought to be Blondi was exhumed and photographed by the Soviets.^[32]

More at: https://en.wikipedia.org/wiki/Blondi