Analysis of information sources in references of the Wikipedia article "Blondi" in English language version.
One sure way to irritate the Führer was to make an excessive fuss of his pet dogs. He was noticeably selfish in his desire for their unflinching affection and if they responded to stroking from anyone else, Hitler became visibly irritated.
I avoided, as did any reasonably prudent visitor to Hitler, arousing any feelings of friendship in the dog. That was often not so easy, especially when at meals the dog laid his head on my knee and in this position attentively studied the pieces of meat, which he evidently preferred to his master's vegetarian dishes. When Hitler noticed such disloyalty, he irritably called the dog back.